Module 59 - A322a

A322a: Understanding User Needs for Transportation Field Cabinet Systems Using ATC 5301 v02

HTML of the PowerPoint Presentation

(Note: This document has been converted from a PowerPoint presentation to 508-compliant HTML. The formatting has been adjusted for 508 compliance, but all the original text content is included, plus additional text descriptions for the images, photos and/or diagrams have been provided below.)

---

Slide 1:

Slide 2:

Welcome

Ken Leonard, Director
ITS Joint Program Office

Ken.Leonard@dot.gov

ITS PCB Home

Slide 3:

Module A322a: Understanding User Needs for Transportation Field Cabinet Systems Using ATC 5301 v02

(Extended Text Description: Title slide: Module A322a: Understanding User Needs for Transportation Field Cabinet Systems Using ATC 5301 v02. This slide contains a graphic representation of an Advanced Transportation Controller (ATC) Cabinet system.

The graphic is centered below the title of the module and outlined by a rounded rectangle. The graphic and outline take up approximately 67% of the slide height and 25% of the slide width. The graphic shows the interior of an cabinet system and its devices. The measurements below approximately represent the sizes they would be physically in an actual cabinet system.

The cabinet devices are arranged in a rack that has metal mounting "rails" on left and right sides of the cabinet. The rails are approximately 19 inches apart and extending the height of the cabinet. Each rail is approximately one inch in width. They are used to secure devices within the cabinet. There are 6 levels of devices in the cabinet system with little or no space between them. The heights of the levels are measured in Us where a U is 1.75 inches high.

Some of the devices are color coded so that their purpose can be associated with a general element of the cabinet system. This becomes evident as the presentation progresses.

At the first level (from the top) is a single rectangular device that extends from rail to rail and is approximately 5U in height. It has a screen and two keypads, a LED that has the word "ACTIVE" below it. It has 7 miscellaneous connectors. It has a toggle switch in the lower right that has the label "AUX" next to it. It has "OFF" on top and "ON" below it. In large letters, on the right side of the device are large letters "ATC." This is and Advanced Transportation Controller. This device is colored blue to indicate that it is the "Controller" element of the cabinet system.

At the second level is a single rectangular device that extends from rail to rail and is approximately 1U in height. It has a screen on the right of the device and columns of 5 LEDs extending over 50% of the device starting on the left. Between the columns of LEDs and the screen are large letters "ADU." This is an Auxiliary Display Unit. This device is colored pink to indicate that it is part of the "Monitoring" element of the cabinet system.

At the third level is the input assembly that extends from rail to rail and is approximately 4U in height. It contains thirteen smaller rectangular devices that are approximately 1.5 inches in width and 4.5 inches in height. The leftmost device is labeled "SIU." The other twelve devices are labeled "SU." The SIU is colored violet to indicate that it is part of the "Internal Bus" element of the cabinet system. The SUs are colored aqua to indicate they are the "Inputs" element of the cabinet system.

At the fourth level is the output assembly that extends from rail to rail and is approximately 4U in height. It contains other devices. At the leftmost of the assembly, is a panel that is almost as tall as the assembly and about 4.5 inches wide. The panel contains what appear to be switches of various types. To the right of the panel is a smaller rectangular device that is approximately 2 inches in width and 4 inches in height. It is labeled "CMU." This is followed by nine other small rectangular devices that are approximately 1.5 inches in width and 4.5 inches in height. Eight of the devices are labeled "HDSP." The rightmost device is labeled "SIU." The CMU is colored pink to indicate that it is part of the "Monitoring" element of the cabinet system. The HDSPs are yellow to indicate the "Outputs" element of the cabinet system. The SIU is colored violet to indicate that it is a part of the "Internal Bus" element of the cabinet system.

At the fifth level is a single rectangular device that extends from rail to rail and is approximately 1U in height. It has assorted LEDs on the right side of the device. On the left side of the device is the label "CPS." This is the Cabinet Power Supply. The CPS is colored light grey to be representative of the "Power Supply" element of the cabinet system.

At the sixth level there are two different assemblies. The field termination assembly is a rectangular assembly that is attached toward the back of the cabinet. It appears to extend rail to rail and is 4U in height and has at least 8 columns of wiring terminators. There may be others terminators unseen. The service assembly is a rectangular assembly located in the front of the field termination assembly. It is attached to the right cabinet rail. It is approximately 5U in height and 5.5 inches wide. This assembly has what appear to be an assortment of switches, a standard power dual receptacle, and a small rectangular device that is approximately 1.5 inches in width and 4.5 inches in height. This device is labeled "HDFU." It is yellow to indicate that although it is located here, it is part of the "Outputs" element of the cabinet system.)

Graphics: Ralph W. Boaz

Slide 4:

Instructor

Ralph W. Boaz

President

Pillar Consulting, Inc.

Slide 5:

Learning Objectives

• Explain the advantages of transportation field cabinet systems based on the ATC 5301 Standard v02
• Describe the structure of the ATC 5301 Standard v02
• Identify and write user needs for ATC Cabinet systems
• Create a concept of operations for ATC Cabinets

Slide 6:

Learning Objective 1

Explain the advantages of transportation field cabinet systems based on the ATC 5301 Standard v02

Slide 7:

Basic Operation of Transportation Field Cabinet Systems (TFCSs)

(Extended Text Description: This is slide is entitled "Basic operation of transportation field cabinet systems (TFCSs)." There are two large graphics. The leftmost graphic is the aluminum looking cabinet. The cabinet has a door with a horizontal handle on the left side of the cabinet and two vent slots in the center top. The cabinet is about 2.5 times high as it is long. It is about 50% of the slide height. Above it is the word "Housing." The rightmost graphic is an enlargement of the aluminum cabinet showing the contents of the cabinet. Inside the cabinet are six labeled cuboids that extend almost the width of the cabinet and evenly distributed vertically. They represent the elements of the cabinet system. Starting from the top the cuboids labeled and color coded as follows:

• "Inputs" colored aqua;
• "Controller" colored blue;
• "Outputs" colored yellow;
• "Monitoring" colored pink;
• "Power Supply" colored grey; and
• "Internal Bus" colored violet.

There is a large left bracket between the cabinet graphic and the enlargement emphasizing that the right graphic represents the contents of the cabinet.)

Graphics: Ralph W. Boaz

Slide 8:

Basic Operation of a Transportation Field Cabinet Systems

(TFCSs)

(Extended Text Description: This slide is entitled "Basic operation of transportation field cabinet systems (TFCSs)." On the upper right side of the slide is a graphical representation of a 4-way intersection. It is about ⅕ of the slide in width and ¼ of the slide in height. It is depicted as two two-lane roads intersecting perpendicularly, North/South and East/West in the shape of a large cross (it is assumed that the top of the slide is North). There is a centerline on each road to differentiate the northbound lane from the southbound lane and the eastbound lane from the westbound lane. The area where the roads cross (center of the cross) is blank (no lines running through it). In each lane representing the southbound, northbound, westbound, and eastbound approaches to the intersection, there are rectangles extending across the width of the lane (total four lanes). The rectangles have one edge at the point where the blank center area begins and extends back into the lane about 1½ times their width. This graphic is labeled "Field Sensors.

In the lower right of the slide is a graphic of a traffic signal mast arm. On the mast are three traffic signal heads. This graphic is labeled "Field Displays." On the left side of the slide are four cuboids each the same size and about 5 times wider than their height or depth. They are evenly spaced and aligned with each other. They are labeled top to bottom "Inputs, Controller, Outputs and Monitoring."

There are arrows showing the flow of information through the TFCS. There is an arrow extending out of the top of the Field Sensors graphic into the Inputs cuboid. There is an arrow extending out of the bottom of the of the Inputs cuboid to the Controller cuboid. There is an arrow extending out of the Controller cuboid to the Outputs cuboid. There is an arrow extending out of the Outputs cuboid to the Monitoring cuboid. There is a double arrow extending from the left side of the Monitoring cuboid back up to the left side of the Controller cuboid. This line has a label associated with via a dotted line. The label says "Controller/Monitor Communications Used in NEMA TS-2, ITS Cabinets and ATC Cabinets." There is a line extending from the ride side of the Outputs cuboid to the top of the Field Displays graphic.)

Graphics: Ralph W. Boaz

Slide 9:

Basic Operation of TFCSs - Input Channels

(Extended Text Description: This slide, entitled "Basic operation of TFCSs – Input Channels," is animated and initially shows two graphics. In the lower right and taking up approximately ⅓ of the slide is a graphical representation of a 4-way intersection. It is depicted as two two-lane roads intersecting perpendicularly. On the right lane of each approach to the intersection are small rectangles representing loop wires in the street (total of four). The graphic is labeled "Loops in Street." In the upper left and taking up approximately 1/3 of the slide is a graphic representation of the right 25% of a cabinet input rack. The remainder of the rack is not shown. It appears as a rectangular metal box that is open to the front. There are two screw holes on the right edge where it could be attached to the rails of the cabinet. There is nothing in the rack. The graphic is labeled "Input Rack with Loop Detectors."

When the instructor discusses the input channels concept, two rectangles appear in the left of input rack that are about 95% of the available height inside the rack and 20% of the available width of the rack portion shown. They are aqua in color and both of them are labeled "1 CHAN." They represent single channel detectors. Then single bold lines from two of the loops in the lower graphic connect to the two single channel detectors, one loop to one detector. As the discussion continues, another detector appears in the rack to the right of the previous detectors. It is labeled "2 CHAN." Then single bold lines from the other two of the loops in the lower graphic connect to the one dual channel detector, two loops to the one detector.)

Graphics: Ralph W. Boaz

Slide 10:

Basic operation of TFCSs - Output Channels

(Extended Text Description: This slide, entitled "Basic operation of TFCSs – Output Channels," is animated and initially shows two graphics. In the lower right and taking up approximately 1/3 of the slide is a graphical representation of a 4-way intersection. It is depicted as two two-lane roads intersecting perpendicularly. Opposite of each on approach to the intersection are small traffic signal heads (total of four). The graphic is labeled "Signals in Street." In the upper left and taking up approximately 1/3 of the slide is a graphic representation of the right 25% of a cabinet output rack. The remainder of the rack is not shown. It appears as a rectangular metal box that is open to the front. There are two screw holes on the right edge where it could be attached to the rails of the cabinet. There is nothing in the rack. The graphic is labeled "Output Rack with Switch Packs (Load Switches)."

When the instructor discusses the output channels concept, two rectangles appear in the left of input rack that are about 95% of the available height inside the rack and 20% of the available width of the rack portion shown. They are yellow in color and both of them are labeled "1 CHAN." They represent single channel switch packs. Then single bold lines from two of the traffic signal heads in the lower graphic connect to the two single channel switch packs, one signal head to one switch pack. As the discussion continues, another switch pack appears in the rack to the right of the previous switch packs. It is labeled "2 CHAN." It represents a dual channel switch pack. Then single bold lines from the other two of the traffic signal heads in the lower graphic connect to the one dual channel detector, two signal heads to the one switch pack.)

Graphics: Ralph W. Boaz

Slide 11:

Evolution of Transportation Field Cabinet Systems

(Extended Text Description: This slide, entitled "Evolution of Transportation Field Cabinet Systems," contains a horizontal arrow that stretches almost the entire width of the slide near the bottom. There are years listed beneath the timeline (not evenly spaced) as follows: "1940s," "1976," "1980s," "1992," "1998," and "2006." Above the timeline are labeled photographs of TFCSs of different shapes and sizes as follows:

1. Above the 1940s point in the time line is a picture of a TFCS that is about 3½ feet tall and 2 feet wide with the door open and out of view. It has a single shelf approximately ⅓ down from the top of the cabinet. On the shelf is a cuboid type taller than it is wide with a dial on it. Otherwise the internal back of the cabinet has an electrical panel with numerous wires attached to it. The label above this picture says "Electro-Mechanical."
2. Above the 1976 point in the time line is a picture of a TFCS that is about 4 feet tall and 2½ feet wide with the door open and out of view. It has two shelves approximately ⅓ and ⅔ down from the top of the cabinet. On the top shelf sit two cuboid electronic devices. On the middle shelf is a larger cuboid device about 1½ feet wide with four thick round cables attached to it. There is an additional smaller cable coming from the device. All 5 cables are attached and spaced equidistantly across the bottom portion of the device. The lower internal back area of the cabinet has an electrical panel with numerous wires attached to it. The label above this picture says "NEMA TS-1."
3. Above the 1980s point in the time line is a picture of a TFCS that is about 5½ feet tall and 2 feet wide with the door open and out of view. The interior of the cabinet contains a 19 inch wide standard electronic equipment rack. The side metal rails of the rack run along the left and right sides of the front of the cabinet interior. There are four sections of the equipment that extend edge to edge of the cabinet interior attaching to the side rails of the rack with screws. There are a few thin cables running between components. There is a piece of cardboard in over the left side of the upper section of the cabinet. The label above this picture says "Model 3XX."
4. Above the 1992 point in the time line is a picture of a TFCS that is about 4½ feet tall and 3½ feet wide with the door open and out of view. It has two shelves approximately ⅙ and ⅖ down from the top of the cabinet. On the top shelf sit two cuboid electronic devices that appear to be racks for holding other devices. On the middle shelf are two larger cuboid devices with one being about 1½ feet long and 1 foot high and the other about ½ feet wide and 1 foot tall. There are cables running between all of the devices. The lower remainder of the cabinet has various devices with lights on them that appear to be plugged into an electrical panel in the back of the cabinet interior. The label above this picture says "NEMA TS-2."
5. Above the 1998 point in the time line is a picture of a TFCS that is about 4½ feet tall and 3½ feet wide with the door open and out of view. It has two shelves approximately ⅙ and ⅖ down from the top of the cabinet. On the top shelf sit two cuboid electronic devices that appear to be racks for holding other devices. On the middle shelf are two larger cuboid devices with one being about 1½ feet long and 1 foot high and the other about ½ feet wide and 1 foot tall. There are cables running between all of the devices. The lower remainder of the cabinet has various devices with lights on them that appear to be plugged into an electrical panel in the back of the cabinet interior. The label above this picture says "TS-2 with NTCIP."
6. Above the 2002 point in the time line is a picture of a TFCS that is about 4 feet tall and 2 feet wide with the outer metal shell of the cabinet removed exposing the interior of the cabinet. The interior of the cabinet contains a 19 inch wide standard electronic equipment rack. The side metal rails of the rack run along the left and right sides of the front of the cabinet interior. There are five sections of the equipment that extend edge to edge of the cabinet interior attaching to the side rails of the rack with screws. There are a few thin cables running between components towards the bottom of the cabinet. The label above this picture says "ITS Cabinet."

)

Photos: TS-1 photo courtesy of Econolite, others by Ralph W. Boaz.

Slide 12:

Brief History of the Development

• ITS Cabinet Standard Version v01 published in November 2006
• Funded effort on Version 2 of the standard 2008-2010
  • Industry needs required a new version of the standard
  • Ban on incandescent bulbs, EPA mercury regulations, state safety regulations
• Work continued on a volunteer basis into 2011
• ITS Cabinet v02 Standards Requirements Specification (StdRS) developed
  • Includes Concept of Operations (ConOps) with user needs identified and formally stated
  • Includes high-level requirements

Slide 13:

Brief History of the Development

• Three manufacturers continued the work to a detail level design and produced working equipment
• Project funded again starting in late 2015
• Detailed designs and lessons learned from manufacturers incorporated into the standard
• Name changed to ATC 5301 Cabinet Standard v02
  • aka ATC Cabinet or ATCC
• Jointly Approved 4th Quarter 2018 and Published March 2019
• Over 1000 ATC Cabinets deployed across the US produced by five manufacturers

Slide 14:

Brief History of the Development

(Extended Text Description: This slide is titled "Brief History of the Development." The primary content of the slide is a graphic representing the systems life cycle in a V-like formation called the Vee Diagram. The Vee Diagram is depicted as an arrangement of "left-leaning" parallelograms on the left side of the "V" down to the vertex which is a trapezoid and "right-leaning" parallelograms on the right side of the "V". At the top left of the "V", there is an additional parallelogram next to the left of the top parallelogram. At the top right of the "V", there are two additional parallelograms to the right of the top parallelogram. It is said that the graphic looks like the letter "V" with wings. There is a long thin horizontal arrow which points to the right at the bottom of the slide with the words "Time Line" sitting on top of it. The arrow extends along the bottom of the slide covering the distance of most of the V-like graphic.

Each parallelogram delineates systems life cycle activities. From left to right on the left horizontal portion, there are two sections labeled: "Regional Architecture" and "Needs & Feasibility." Moving downward on the left side of the Vee Diagram there are four sections labeled: "Concept of Operations," "Requirements," "High-Level Design" and "Detailed Design". The trapezoid at the vertex of the Vee Diagram is labeled "Software/Hardware Development & Field Test." Moving upward on the right side of the Vee Diagram there are four sections labeled: "Unit/Devices," "Sub Systems," "System Verification," and "System Validation." From left to right on the right horizontal portion, there are three sections labeled: "Operations & Maintenance," "Changes & Upgrade" and "Retire/Replace."

To the left of the parallelograms forming the left side of the "V" and to the right of the parallelograms forming the right side of the "V" are dates and text highlighting milestones in the development of the ATC Standard that pertain to the activity of the parallelogram. On the left side from the top of the "V" to the bottom are the following:

• "2007: WG Formed * User Needs, Austin, TX"
• "2008: ConOps * Salt Lake City, UT"
• "2009: Requirements * By Working Group"
• "2010: High Level Design, Workshop, Houston TX"
• "2011: Detailed Design * Volunteer Effort"
• "2012: Development * Volunteer Effort. "

On the right side from the bottom of the "V" to the top are the following:

• "2013: Field Test * Volunteer Effort"
• "2014: 1st Article Manufacturing * Volunteer Effort by (3) Vendors"
• "2015: WG Effort Resumes * Standardization Subsystem Design"
• "2016: Requirements Verification * Traceability -> (3) Vendors"
• "2017: Design Traceability * Disposition 1,032 WG Comments"
• "2018: Recommended Standard * AASHTO/ITE/ NEMA Approval.

)

Slide 15:

ATC Cabinet v02 Generic Representation - Design Goals

• Focus on increasing value to end users
• Flexibility within the standard for innovative designs
• Higher density - More capability in a smaller space
• Increased technician safety
• Increased public safety
• Enhanced monitoring functionality
• Increased cabinet power efficiency
• Provide LED signal compatibility

Slide 16:

ATC Cabinet v02 Generic Representation

Major Assemblies

• Assembly
  • Any subordinate element to the cabinet system that is made up of multiple parts or components
  • Major and minor Assemblies
• Major assemblies are:
  • Controller - Covered by ATC 5201 and ATC 5401 Standards
  • Input Assembly
  • Output Assembly
  • Field Termination Assembly
  • Service Assembly

Slide 17:

ATC Cabinet v02 Generic Representation - Components

• Component
  • An electronic assembly with major functional attributes of the TFCS where some level of functional and/or physical interchangeability is desired
• Components are:
  • Serial Interface Unit (SIU)
  • High-Density Switch Pack/Flasher Unit (HDSP/FU)
  • Cabinet Monitor Unit (CMU)
  • Cabinet Power Supply (CPS)
  • Auxiliary Display Unit (ADU)
  • Sensor Unit (SU)

Slide 18:

ATC Cabinet v02 Generic Representation

(Extended Text Description: This slide entitled "ATC Cabinet v02 Generic Representation" contains two graphics previously described. The graphic on the left shows the basic elements of all cabinet systems. The graphic on the right shows the interior of an ATC Cabinet System. The graphic on the right is twice as large as the graphic on the left.

The left graphic shows the elements of a cabinet system. Inside the cabinet are six labeled cuboids that extend almost the width of the cabinet and evenly distributed vertically. They represent the elements of the cabinet system. Starting from the top the cuboids labeled and color coded as follows:

• "Inputs" colored aqua;
• "Controller" colored blue;
• "Outputs" colored yellow;
• "Monitoring" colored pink;
• "Power Supply" colored grey; and
• "Internal Bus" colored violet.

The right graphic is a representation of an ATC Cabinet System. It takes up approximately 90% of the slide height and 40% of the slide width. The graphic shows the interior of a cabinet system and its devices. The measurements below approximately represent the sizes they would be physically in an actual cabinet system.

The cabinet devices are arranged in a rack that has metal mounting "rails" on left and right sides of the cabinet. The rails are approximately 19 inches apart and extending the height of the cabinet. Each rail is approximately one inch in width. They are used to secure devices within the cabinet. There are 6 levels of devices in the cabinet system with little or no space between them. The heights of the levels are measured in Us where a U is 1.75 inches high.

Some of the devices are color coded so that their purpose can be associated with a general element of the cabinet system. This becomes evident as the presentation progresses.

At the first level (from the top) is a single rectangular device that extends from rail to rail and is approximately 5U in height. It has a screen and two keypads, a LED that has the word "ACTIVE" below it. It has 7 miscellaneous connectors. It has a toggle switch in the lower right that has the label "AUX" next to it. It has "OFF" on top and "ON" below it. In large letters, on the right side of the device are large letters "ATC." This is and Advanced Transportation Controller. This device is colored blue to indicate that it is the "Controller" element of the cabinet system.

At the second level is a single rectangular device that extends from rail to rail and is approximately 1U in height. It has a screen on the right of the device and columns of 5 LEDs extending over 50% of the device starting on the left. Between the columns of LEDs and the screen are large letters "ADU." This is an Auxiliary Display Unit. This device is colored pink to indicate that it is part of the "Monitoring" element of the cabinet system.

At the third level is the input assembly that that extends from rail to rail and it is approximately 4U in height. It contains thirteen smaller rectangular devices that are approximately 1.5 inches in width and 4.5 inches in height. The leftmost device is labeled "SIU." The other twelve devices are labeled "SU." The SIU is colored violet to indicate that it is part of the "Internal Bus" element of the cabinet system. The SUs are colored aqua to indicate they are the "Inputs" element of the cabinet system.

At the fourth level is the output assembly that extends from rail to rail and it is approximately 4U in height. It contains other devices. At the leftmost of the assembly, is a panel that is almost as tall as the assembly and about 4.5 inches wide. The panel contains what appear to be switches of various types. To the right of the panel is a smaller rectangular device that is approximately 2 inches in width and 4 inches in height. It is labeled "CMU." This is followed by nine other small rectangular devices that are approximately 1.5 inches in width and 4.5 inches in height. Eight of the devices are labeled "HDSP." The rightmost device is labeled "SIU." The CMU is colored pink to indicate that it is part of the "Monitoring" element of the cabinet system. The HDSPs are yellow to indicate the "Outputs" element of the cabinet system. The SIU is colored violet to indicate that it is a part of the "Internal Bus" element of the cabinet system.

At the fifth level is a single rectangular device that extends from rail to rail and is approximately 1U in height. It has assorted LEDs on the right side of the device. On the left side of the device is the label "CPS." This is the Cabinet Power Supply. The CPS is colored light grey to be representative of the "Power Supply" element of the cabinet system.

At the sixth level there are two different assemblies. The field termination assembly is a rectangular assembly that is attached toward the back of the cabinet. It appears to extend rail to rail and is 4U in height and has at least 8 columns of wiring terminators. There may be others terminators unseen. The service assembly is a rectangular assembly located in the front of the field termination assembly. It is attached to the right cabinet rail. It is approximately 5U in height and 5.5 inches wide. This assembly has what appear to be an assortment of switches, a standard power dual receptacle, and a small rectangular device that is approximately 1.5 inches in width and 4.5 inches in height. This device is labeled "HDFU." It is yellow to indicate that although it is located here, it is part of the "Outputs" element of the cabinet system.

This slide is animated as it is discussed by the instructor.

• Click 1: The cabinet graphic on the right appears.
• Click 2: Rails come down for cabinet graphic on the right.
• Click 3: A transportation controller appears.
• Click 4: The input assembly appears.
• Click 5: The output assembly appears.
• Click 6: The Auxiliary Display Unit appears.
• Click 7: The Field Termination Assembly appears.
• Click 8. The service assembly appears.
• Click 9. The Cabinet Power Supply appears.

)

Graphics: Ralph W. Boaz

Slide 19:

Benefits of ATC 5301 v02

• Functional standard except where component interchangeability is desired
• Double the number of detector channels in the same space
• Double the number of channels per switch pack and the switch pack is physically smaller
• Eliminate arc flash hazard per NFPA 70E
• Touch safe design
• Low voltage option for 48 VDC on field wires
  • Electrically safe for humans

Slide 20:

Benefits of ATC 5301 v02

• Most assemblies replaceable while intersection in flash
• Load current monitoring for detecting dark approaches
• Better LED compatibility issue - potential power conservation and alternative power sources

Slide 21:

Benefits of ATC 5301 v02 - Major Assemblies Removable while in Flash

(Extended Text Description: This slide, entitled "Benefits of ATC 5301 v02 - Major assemblies removable while in Flash," has the same graphics as shown for Slide #18 except that the animation is different. This slide starts out with both of the graphics being shown. This slide is animated as it is discussed by the instructor.

• Click 1: The Auxiliary Display Unit disappears.
• Click 2: The input assembly disappears.
• Click 3: The transportation controller disappears.
• Click 4: The output assembly disappears.

)

Graphics: Ralph W. Boaz

Slide 22:

Benefits of ATC 5301 v02 - Many Designs

(Extended Text Description: This slide entitled "Benefits of ATC 5301 v02 – Many designs" has three photographs of actual ATC Cabinets distributed left to right on the slide. In describing the cabinets, they will be compared to the ATC Cabinet graphic of Slide #18. The left ATC Cabinet is similar to that of Slide#18 except for the following:

• the cabinet is thinner (14-15 inch rack);
• the cabinet power supply cannot be seen from the front;
• the ADU is below the input assembly; and
• the SIU is in the center of the output assembly.

The center ATC Cabinet is similar to that of Slide#18 except for the following:

• the ADU is above the controller;
• the cabinet power supply is located below the controller, it is larger and also functions as a battery backup system;
• there are two SIUs in the input assembly;
• a service assembly is not shown; and
• the CMU is on right side of the output assembly.

The right ATC Cabinet is similar to that of Slide#18 except for the following:

• the ADU is above the controller;
• the cabinet power supply cannot be seen from the front; and
• there is no field termination assembly shown.

)

Photos: Center cabinet photo courtesy of Econolite, others by Ralph W. Boaz.

Slide 23:

Benefits of ATC 5301 v02 - Many Designs

(Extended Text Description: This slide entitled "Benefits of ATC 5301 v02 – Many designs" has two photographs of actual ATC Cabinets distributed left to right on the slide. In describing the cabinets, they will be compared to the ATC Cabinet graphic of Slide #18.

The left ATC Cabinet is very different from that of Slide #18. This is a NEMA cabinet retrofitted with the ATC Cabinet assemblies. The cabinet has two shelves the stretch the full width of the cabinet. The cabinet is twice the width of 19 rack cabinets. The top shelf has two large rectangular devices that are a battery backup system. The input assembly and the controller are both sitting on the second shelf. The output assembly is sitting below the second shelf on its small shelf.

The right ATC Cabinet is similar to that of Slide#18 except for the following:

• the cabinet power supply is not shown and
• the service assembly is on the lower left of the cabinet.

)

Photos: Ralph W. Boaz

Slide 24:

Benefits of ATC 5301 v02 - Number of I/O Channels

TFCS	Physical Mounting	Internal Bus	Signal Monitor	Input Channels	Monitored Output Channels
ATC Cabinet	Rack and Shelf	Serial 614.4 kbps	Cabinet Monitor Unit	120	32
ITS Cabinet v01	Rack	Serial 614.4 kbps	Cabinet Monitor Unit	120	28
NEMA TS-2	Shelf	Serial 153.6 kbps	Malfunction Management Unit	64	16
Caltrans Model 33X	Rack	Parallel/Discrete Wiring	Conflict Monitor	44	16/18
NEMA TS-1	Shelf	Parallel/Discrete Wiring	Conflict Monitor	8	3/6/12/18

Slide 25:

Slide 26:

Question

Which of the following is NOT a benefit of using the ATC Cabinet Standard?

Answer Choices

1. Low voltage option for 48 VDC on field wires
2. Touch Safe Design
3. Functional standard except where interchangeability desired
4. Same # of channels per switch pack as ITS Cabinet v01

Slide 27:

Review of Answers

a) Low voltage option for 48 VDC on field wires
Incorrect. ATC Cabinet has a low voltage option. That would help protect the public in the case of knock downs.

b) Touch Safe Design
Incorrect. A touch safe design protects technicians from high voltage exposed wiring.

c) Functional standard except where interchangeability desired
Incorrect. ATC Cabinet Standard allows for innovation in cabinet designs while maintaining component interchangeability.

d) Same number of channels per switch pack as ITS Cabinet v01
ATC Cabinet has DOUBLE the number of channels per switch pack than the ITS Cabinet Standard v01.

Slide 28:

Learning Objective 2

Describe the structure of the ATC 5301 Standard v02

Slide 29:

Sections of ATC 5301 Standard v02

1. Purpose of the Document
2. Scope of Project
3. Referenced Documents
4. Conventions Used in This Document
5. High Level Block Diagram
6. Components
7. Slots
8. Interfaces

Slide 30:

Sections of ATC 5301 Standard v02

9. Protocols
10. Product Safety and Reliability
11. Environmental and Testing Requirements
12. Wire Requirements
13. Acronyms
14. Needs to Requirements to Design Traceability
15. Non Functional Requirements
16. ATCC Power Signal Naming Conventions

Slide 31:

High Level Functional Block Diagrams

• Standard contains two High Level Functional Block Diagrams
  • High Voltage Operation 120 VAC
  • Low Voltage Operation 48 VDC
• Central to understanding the detailed design of standard
• Diagram identifies the relationship of design elements and interfaces within the standard
• Each of the element and interfaces shown are described in a corresponding section of the standard
• All design elements (except sheet metal) and interfaces have electrical requirements
• Only some design elements and interfaces have mechanical requirements

Slide 32:

High Level Functional Block Diagrams

• Oval hatched symbol with dashed border indicates an interface defined by the standard electrically but it may require an adapter for interchangeability among manufacturers.

• Oval symbol with solid line indicates interface used to connect physical cabinet elements

Slide 33:

High Level Functional Block Diagrams

• Hatched symbol with dashed border indicates a functionality in the standard but the standard does not control mechanical dimensions

• Rectangular symbol with solid line indicates physical cabinet element

Slide 34:

High Level Functional Block Diagrams - High Voltage

(Extended Text Description: Author's relevant description for this figure: This slide entitled "High Level Functional Block Diagrams – High Voltage" is animated. At first the High Voltage diagram from the ATC 5301 standard is shown. It is an engineering diagram that takes up about 80% of the height and width of the slide. It has approximately 150 small solid and dashed outlined ellipses and rectangles connected by solid and dashed lines and arrows. There is text identifying the items and a larger rectangle towards the bottom left that contains a legend for the overall diagram. The diagram shows the detailed functions and interfaces within the ATC 5301 cabinet system. It is too detailed to be covered by the instructor. It is there for purposes of letting the students know what it looks like.

When the instructor clicks the mouse, the diagram fades and a graphic overlay is displayed over the diagram. The purpose of the overlay is to identify the cabinet system's functional areas on the diagram if students choose to study the diagram on their own.

There are three rectangles towards the top of the diagram. The first one is about 20% of the height of the diagram and approximately 90% of width of the diagram. It is colored aqua and is labeled "Input Functionality." The two other rectangles are about 10% of the height of the diagram and 40% of the width of the diagram. They are aligned horizontally underneath the first rectangle. They are both colored aqua and labeled "24 Chan Detector Termination Functionality."

There are two rectangles towards the middle left of the diagram. The first one is about 20% of the height of the diagram and about 70% of the width of the diagram. It is colored yellow and is labeled "Output Functionality." Below this is another rectangle that is about 15% of the height of the diagram and 60% of the width of the diagram. This rectangle is labeled "Output Termination Functionality." The two rectangles are aligned on their right sides. They are both colored yellow.

To the right of the "Output Termination Functionality" rectangle is a rectangle that is 15% of the height of the diagram and 20% of the width of the diagram. It is labeled "Power Function" and colored grey.

There are small violet colored rectangles in the "Input Functionality" and "Output Functionality" rectangles labeled "SIU." To the left of the "Output Functionality" rectangle are two small pink colored rectangles labeled "ADU" and "CMU." In the "Power Function" rectangle is a small yellow colored rectangle labeled "FU.")

Graphics: Ralph W. Boaz

Slide 35:

Traceability in ATC 5301 v02

• Traceability found in Section 14 of the ATC 5301 Standard
  • User needs are traced to requirements and requirements are traced to design elements
  • Reference is to the user needs found in Section 4 of the ITS Cabinet v02 Requirements Specification
• Provides for verification of a standard as part of its development
• Provides for validation of a product when a product is built to the standard

Slide 36:

Traceability in ATC 5301 v02

(Extended Text Description: This slide entitled "Traceability in ATC 5301 v02" contains a table the instructor uses to demonstrate traceability. As the instructor discusses the requirements section of the table, a bold rounded rectangle surrounds that section of the table. As the instructor discusses the justification (or user need) section of the table, a bold rounded rectangle surrounds that section of the table. As the instructor discusses the design elements section of the table, a bold rounded rectangle surrounds that section of the table. The table is located below:

Verify the Requirement
Requirement ID	Requirement Title
5.13.1	Diagnostic Display Local Display
Requirement Text The TFCS shall contain a Diagnostic Display Unit (DDU) which supports local display of both historical and current cabinet status and log data collected by the monitoring subsystem.
Justification for the Requirement: The user needs the TFCS to be of a design that reduces the time required for maintenance personnel to perform maintenance actions in the field.
Source for Justification: UN ID 4.3.1.20
Related Design Elements 6.5 Model 2220 Auxiliary Display Unit

)

Slide 37:

Traceability in ATC 5301 v02

(Extended Text Description: This slide entitled "Traceability in ATC 5301 v02" contains a table the instructor uses to demonstrate traceability. As the instructor discusses the requirements section of the table, a bold rounded rectangle surrounds that section of the table. As the instructor discusses the justification (or user need) section of the table, a bold rounded rectangle surrounds that section of the table. As the instructor discusses the design elements section of the table, a bold rounded rectangle surrounds that section of the table. The table is located below:

Verify the Requirement
Requirement ID	Requirement Title
5.4.4	Low Voltage Switch Pack Modules
Requirement Text The following power limitations shall apply to the Low Power / Low Voltage cabinet option: Less than 30 Volts RMS Less than 42 Volts Peak Less than 60 Volts DC
Justification for the Requirement: The user needs the TFCS to provide for field wiring that is at voltage and current levels below those dangerous to humans.
Source for Justification: UN ID 4.3.4.2
Related Design Elements 6.2.2.2 Field Signal Voltage Sense Inputs 6.2.4.1 Field Signal Outputs [Many others]

)

Slide 38:

Traceability in ATC 5301 v02

(Extended Text Description: This slide entitled "Traceability in ATC 5301 v02" contains a table the instructor uses to demonstrate traceability. As the instructor discusses the requirements section of the table, a bold rounded rectangle surrounds that section of the table. As the instructor discusses the justification (or user need) section of the table, a bold rounded rectangle surrounds that section of the table. As the instructor discusses the design elements section of the table, a bold rounded rectangle surrounds that section of the table. The table is located below:

Verify the Requirement
Requirement ID	Requirement Title
5.4.3.1	Two Output Channels per HDSP120
Requirement Text The HDSP120 shall have two output channels
Justification for the Requirement: The user needs the TFCS to support the use of output devices that have higher channel density than the commonly deployed field output devices
Source for Justification: UN ID 4.3.4.1
Related Design Elements 6.2 Model 2202 High Density Switch Pack / Flasher Unit (HDSP/FU)

)

Slide 39:

Slide 40:

Question

True or False?

The High Level Functional Block Diagram identifies how the ATC Cabinet functions perform actuated signal control.

Answer Choices

1. True
2. False

Slide 41:

Review of Answers

a) True
Incorrect. Actuated signal control is described in the NEMA TS-2 standard.

b) False
Correct! The High Level Functional Block Diagram identifies the relationship of design elements and interfaces within the standard.

Slide 42:

Learning Objective 3

Identify and write user needs for ATC Cabinet systems

Slide 43:

Systems Engineering Approach to Developing an ATC Cabinet Procurement Specification

Graphics: Ralph W. Boaz

IEEE - Systems Engineering

An interdisciplinary collaborative approach to derive, evolve, and verify a life cycle balanced system solution that satisfies customer expectations and meets public acceptability.

Slide 44:

Systems Engineering Approach to Developing an ATC Cabinet Procurement Specification

Graphics: Ralph W. Boaz

Slide 45:

Systems Engineering Approach to Developing an ATC Cabinet Procurement Specification

Relationship of User Needs to Requirements

(Extended Text Description: This slide, entitled "Systems Engineering Approach to Developing an ATC Cabinet Procurement Specification," uses graphics to highlight the relationships between user needs and requirements. User needs are represented by green boxes on the left side of the slide labeled "Need #1," "Need #2," "Need #3," and "Need #4." Requirements are represented by green boxes on the right side of the slide labeled "Requirement #1," "Requirement #2," "Requirement #3," and "Requirement #4." Three relationships between the user needs and the requirements are represented using solid blue lines with arrows on each end connecting the needs and requirements as follows:

• One-to-One – Need #1 is connected to Requirement #1;
• One-to-Many – Need #2 is connected to Requirement #2 and Requirement #3; and
• Many-to-One – Need #3 and Need #4 are connected to Requirement #4.

The slide is animated displaying each relationship as the instructor introduces it one at a time until all are shown.)

Graphics: Ralph W. Boaz

Slide 46:

Systems Engineering Approach - Benefits

• User needs identified by a broad base of stakeholders
• Existing strategic or regional plans already approved by policy makers and higher management are part of user needs development
• Provides justification for investment in ATC units that non-technical people can understand
• Shows accountability to the public

Slide 47:

Characteristics of Well-Written User Needs

• Uniquely Identifiable
• Major Desired Capability
• Captures Rationale
• Solution Free

Slide 48:

Example User Needs for an ATC Cabinet System

7.1.1 Modern ITS Standards and Specifications

The city needs the transportation infrastructure to be based on modern ITS standards and specifications. Much of the city’s ITS infrastructure is based on 25-40 year old technology. Infrastructure based on modern ITS standards provides choices for ITS solutions today and in the future. It also offers the best opportunity to leverage new technologies for mobility and safety.

Uniquely Identifiable? ✓
Major Desired Capability? ✓
Captures Rationale? ✓
Solution Free? ✓

Slide 49:

Example User Needs for an ATC Cabinet System

7.2.1 Existing Foundations

The city needs TFCS to use existing cabinet foundations at signalized intersections. Intersections outside the downtown area have Caltrans 332 cabinet foundations. The downtown area has both Caltrans 332 cabinet foundations and pedestal mounts for Caltrans 336 cabinets. The city wants to avoid the cost of having to replace foundations when installing a new cabinet system.

Uniquely Identifiable? ✓
Major Desired Capability? ✓
Captures Rationale? ✓
Solution Free? ✓

Slide 50:

Example User Needs for an ATC Cabinet System

7.4.1 120 VAC Service Power

The city needs the TFCS to operate using existing 120 VAC service power. Numerous on street devices require 120 VAC including traffic signal displays and the city's Changeable Lane Assignment System (CLAS) and lighted cross walks.

Uniquely Identifiable? ✓
Major Desired Capability? ✓
Captures Rationale? ✓
Solution Free? ✓

Slide 51:

Example User Needs for an ATC Cabinet System

7.8.1 Standard Cabinet Configuration

The city needs a TFCS configuration that is suitable for intersections that are outside the downtown area. The number of inputs and outputs need to support 80% or more of the intersections in this configuration. The city has plans to include a UPS in the cabinet and network equipment. Room is required for Connected Vehicle Roadside Equipment once the city chooses to deploy it. The city is identifying this configuration for ease of procurement.

Uniquely Identifiable? ✓
Major Desired Capability? ✓
Captures Rationale? ✓
Solution Free? ✓

Slide 52:

Example User Needs for an ATC Cabinet System

7.8.2 Downtown Cabinet Configuration

The city needs a configuration TFCS that is suitable for intersections that are in the downtown area. The number of inputs and outputs need to support 80% or more of the intersections in this configuration. The city has plans to include a UPS in the cabinet and network equipment. Room is required for Connected Vehicle Roadside Equipment once the city chooses to deploy it. The city is identifying this configuration for ease of procurement.

Uniquely Identifiable? ✓
Major Desired Capability? ✓
Captures Rationale? ✓
Solution Free? ✓

Slide 53:

Example User Needs for an ATC Cabinet System

7.4.2 Multiple Applications

The city needs the TFCS to be used for multiple and concurrently running applications. The city wishes to operate multiple concurrent applications on a single controller unit as part of the TFCS. The city may have a single TFCS operate multiple intersections simultaneously, adjacent ramp meters, and smart city applications not yet identified.

Uniquely Identifiable? ✓
Major Desired Capability? ✓
Captures Rationale? ✓
Solution Free? ✓

Slide 54:

Example User Needs for an ATC Cabinet System (cont.)

7.2.3 Physical Security

The city needs TFCS enclosure that inhibits unauthorized entry into the cabinet. The enclosure should be tamper resistant and use technology to restrict access to unauthorized users. Use of the common #2 key in some areas of the city has resulted in unauthorized access and vandalism.

Uniquely Identifiable? ✓
Major Desired Capability? ✓
Captures Rationale? ✓
Solution Free? ✓

Slide 55:

Slide 56:

Question

Which of the following is a correct statement? Answer Choices

1. Rationales of user needs have proposed solutions
2. User needs must be testable
3. A user need is a major desired capability
4. Only needs in ATC 5301 v02 are valid for a spec

Slide 57:

Review of Answers

a) Rationales of user needs have proposed solutions
Incorrect. A rationale helps to understand what is intended by the major desired capability. A user need is solution free.

b) User needs must be testable
Incorrect. Requirements must be verifiable. One method is by testing. In SE, user needs by are not directly testable.

c) A user need is a major desired capability
Correct! User needs are expressed at a high level. Think of them as goals.

d) Only needs in ATC 5301 v02 are valid for a spec
Incorrect. Agencies will have user needs that are based on their particular policies, area, existing equipment, etc.

Slide 58:

Learning Objective 4

Create a concept of operations for ATC Cabinets

Slide 59:

Structure of a ConOps

• Example from the FHWA Systems Engineering Guidebook V3 - Modified
  1. Purpose of Document
  2. Scope of the Project
  3. Referenced Documents
  4. Background
  5. Concept for the Proposed Procurement
  6. User-Oriented Operational Description
  7. User Needs
  8. Appendices

Slide 60:

Content of the ConOps

1. Purpose of Document
   • Brief Statement 1-2 paragraphs
   • Expected operations of the system to be procured
   • Instrument for stakeholder discussion and consensus
   • Briefly describe contents, intention and audience

Slide 61:

Content of the ConOps

2. Scope of the Project/Specification
   • Brief Statement 1-2 paragraphs
   • Brief overview of the system to be procured
   • The departments involved and other agencies involved directly or indirectly
3. Referenced Documents
   • Documentation and other resources useful in understanding the operation of the system
   • Strategic or regional plans that create or influence the user needs for the procurement

Slide 62:

Content of the ConOps

4. Background
   • Brief description of the current equipment, how it is used currently, and its drawbacks
   • Reasons for the proposed procurement and the general approach to improvements
5. Concept for the Proposed Procurement
   • Discuss alternative concepts and why they are not optimal
   • High-level description of an ATC Cabinet and its use
   • Justification for the approach

Slide 63:

Content of the ConOps

6. User-Oriented Operational Description
   • Section focuses on how the goals and objectives are accomplished currently
   • Describes strategies, tactics, policies, and constraints
   • Describes stakeholders including the operational users and what the users do
   • Describes personnel capabilities, organizational structures, personnel & inter-agency interactions, and types of activities

Slide 64:

Content of the ConOps

7. User Needs
   • Here is a description of the vision, goals & objectives, and personnel needs that drive the requirements for the system
   • User needs are well-written as discussed in Learning Objective #3
8. Appendices
   • Traceability Matrix
   • Glossary
   • Backup or background material for the sections
   • Notes

Slide 65:

Organizing User Needs

7.1 Quality and Construction Needs

7.2 Housing and Mounting Needs

7.3 Communication Needs

7.4 Application Needs

7.5 Maintenance Needs

7.6 Environmental and Testing Needs

7.7 Warranty Needs

7.8 Procurement Needs

7.9 Other Needs

Slide 66:

Traceability of User Needs to Sources

UN ID	User Need	Source(s)
7.1.1	Modern ITS Standards and Specifications	ITS Strategic Deployment Plan (4.1.1)
7.2.1	Existing Foundations	Stakeholders (Public Works)
7.2.2	Physical Security	Stakeholders (IT, Operations)
7.4.1	120 VAC Service Power	Stakeholders
7.4.2	Multiple Applications	Livable Community Plan (5.2.1)
7.8.1	Standard Cabinet Configuration	Stakeholders (Procurement Office)
7.8.2	Downtown Cabinet Configuration	Stakeholders (Procurement Office)

Slide 67:

Slide 68:

Question

Which of the following is a benefit of building a ConOps for an ATC Cabinet?

Answer Choices

1. Provides justification for investment in ATC Cabinets
2. Only technical stakeholders are necessary to produce it
3. Strategic or regional plans are unnecessary
4. Organization of user needs is the same for all agencies

Slide 69:

Review of Answers

a) Provides justification for investment in ATC Cabinets
Correct! ConOps is written from user perspective, there is traceability to existing plans and user needs are identified.

b) Only technical stakeholders are necessary to produce it
Incorrect. User needs for the ConOps come from a broad base of technical and non-technical stakeholders at various levels.

c) Strategic or regional plans are unnecessary
Incorrect. Existing plans become a source of user needs that justify the investment in ATC Cabinets.

d) Organization of user needs is the same for all agencies
Incorrect. Agencies should have user needs organized in a manner that is most effective for their agency.

Slide 70:

Module Summary

• Explain the advantages of transportation field cabinet systems based on the ATC 5301 Standard v02
• Describe the structure of the ATC 5301 Standard v02
• Identify and write user needs for ATC Cabinet systems
• Create a concept of operations for ATC Cabinets

Slide 71:

Next Course Module

Module 322b

Understanding Requirements for Transportation Field Cabinet Systems Using ATC 5301 v02

The second module on ATC 5301 v02 will describe the assemblies, components and options for ATC Cabinets. It will demonstrate how to develop requirements for ATC Cabinets based on user needs identified in Module A322a. Module 322b will show how to create an agency ATC Cabinet specification and how to verify that it is complete.

Slide 72:

Thank you for completing this module. Feedback

Please use the Feedback link below to provide us with your thoughts and comments about the value of the training.

Thank you!

↑ Return to top