Webinar Presentation

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Data and Connected Vehicle Support of Active Traffic Management Strategies
(October 31, 2016)

Development of Warrants for Installation and Activation of Ramp Metering

Presenter: Homa Fartash
Presenter’s Org: Florida International University (FIU)

The purpose of the T3e webinar series is to provide a platform for students to share their research findings. References in this webinar to any specific commercial products, processes, or services, or the use of any trade, firm, or corporation name is for the information and convenience of the public, and does not constitute endorsement, recommendation, or favoring by the U.S. DOT.

The slides in this presentation are branded with the FIU Engineering and Computing logo.

Slide 1: Presenter Introduction

Homa Fartash, Ph.D. Candidate

Research Interests:
- Intelligent Transportation Systems
- Active Traffic Management
- Traffic Operations and Control
- Traffic Simulation
Dissertation Title:
- Development of System-based Warrants for Installation and Activation of Ramp Metering
Selected Honors/Awards:
- 2016 GCCITE BOOK Scholarship, 2016
- FSITE Daniel B. Fambro Student Paper Award, 2016
- Anne Brewer Scholarship, ITS Florida, 2015
- Sanchez Grand Prix Scholarship, 2015
- 2nd Position for FSITE Poster Competition, 2015

[This slide contains a photo of Homa Fartash.]

Slide 2: Ramp Metering

[This slide contains drawings that display freeways with ramp metering and freeways without ramp metering. The images show the advantages of ramp metering and the disadvantages when lacking ramp metering.]

Slide 3: Problem Statement

Ramp Metering Warrants for Installation - Criteria

Local Traffic Criteria
Local Geometric Criteria
Local Safety Criteria

Ramp Metering Algorithms for Operation - Operation Extent

Local Traffic Parameters
System-wide Traffic Parameters

[This slide contains a graphic of a person climbing an arrow designed as a set of stairs. The arrow points from the Ramp Metering Warrants for Installation text above to the Ramp Metering Algorithms for Operation text above.]

Slide 4: Framework

[This slide contains a flowchart for the ramp metering framework research - from identifying potential parameters for the warrants to three objectives to non-recurrent and recurrent conditions to incidents and adverse weather.]

Slide 5: Assessment of the Need for Developing System-based Warrants

[This slide contains a process flow that consists of a “Selecting Locally Justified Ramps” flowchart, a list of criteria for “Selecting System-based Justified Ramps,” a “Simulation using VISSIM” step, and a “Comparison.”]

Slide 6: Bottleneck Identification

[This slide contains two images: (1) a map of Broward County, FL, with US 95 colored blue from Commercial Boulevard in Lauderdale-By-The-Sea to Hallandale Beach Boulevard in Hollywood with 12 exits labeled and (2) a line graph that shows the stochastic capacity distribution at bottleneck location.]

Slide 7: Ramp Selection

[This slide contains a table that compares locally justified ramps to system justified ramps and where they could work. The system justified ramps are further broken down into 95^th, 80^th, 50^th, and 30^th percentile bottleneck capacity.]

Slide 8: Speed Profile

[This slide contains a table of six colored speed profile charts: three from the 95^th percentile capacity and three from the 80^th percentile capacity: unmetered, locally justified ramps, and system justified ramps.]

Slide 9: Travel Time

[This slide contains two images: (1) a vertical bar graph that shows where unmetered, locally justified ramps, and system justified ramps fall within the 95^th, 80^th, 50^th and 30^th percentile bottleneck capacity. The graph shows travel time (seconds) over travel time on freeway mainline.]

Slide 10: Travel Time

[This slide contains two vertical bar graphs that plot travel time in seconds for unmetered, locally justified ramps, and system justified ramps for twelve locations in the 95^th percentile capacity and in the 80^th percentile capacity.]

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