WYDOT Device Acquisition and Installation Webinar Q&A

July 23, 2018

  1. Is WYDOT conducting their CVP in-house or contracting outside for management & operations?

WYDOT is conducting operations in-house and ICF is providing project management support.

  1. What pavement surface sensor (temp/water & ice accumulation/chemical content) has WYDOT found to be the most reliable?

WYDOT uses both non-invasive and in-pavement sensors.

  1. Are the V2X messages sent via XM radio, or roadside beacons?

Both. It is based on the geofenced areas. If there are roadside units in the area, the messages would use DSRC. If there are not roadside units nearby, the messages would use SiriusXM.

  1. On slide 14, what does LTS stand for?

Location-Time Services.

  1. Have you experienced any communication problems with DSRC or Sirius XM due to weather?

The system’s each have their limitations but complement each other well. SiriusXM is not being used for real-time communications (since there is a 5 minute lag), while DSRC has geographical limitations (~300m).

  1. Why is the HSM in the TMC and not in the OBU or the RSU?

There are actually three configurations of HSMs: one at the TMC, one on every OBU and one on every RSU.

  1. Did you consider pushing messages to other 3rd party providers (i.e., Waze)?

Yes – there is a connection that a 3rd party such as Waze can connect with.

  1. What Hardware Security Module do the OBUs and RSUs use? And are they compliant with e.g. FIPS-140-2 or any other standard?

    We are using Infineon chip HSMs on the OBUs and RSUs that are FIPS-140-2 Level 3 certified.

  2. Can IPv6 and IPv4 run in parallel, or do they have to run individually?

They can run together.

  1. What is the format of the data and how do we get a sample of the data?

The format depends on the message type. The Interface Control Document shows all the fields Wyoming is collecting data on.

  1. For vehicles without the needed hardware, are there/will there be after-market products consumers could purchase to gain access to this service? And if so, what is the timeline for that becoming available to the general public?

You could not go out and buy a device today and have it be interoperable – that is still a few years away.

  1. Who were you purchasing the antennas through?

The SiriusXM OBUs are using Power over Ethernet antennas from Sirius XM. The Lear devices are using 2 different antennae sets: a “shark fin” model and a pole antenna.

  1. Once phase 3 starts, can other OEMs test their systems in your site?  If yes, what is required from their sides?

It will be a production environment, so anyone with connected vehicle equipment that drives through the corridor could be able to communicate. However, “testing” in the production environment is discouraged as it could interfere with the impact assessment.

  1. Slide 27: What kind of quick basic testing did you conduct for the OBUs?

We verified that they can send/receive BSMs through a FCW scenario and TIMs through a Distress Notification scenario.

  1. Could you elaborate the IPv6/IPv4 issues experienced and how do they get resolved?

A lot of network devices do not support IPv6. Some devices were able to update their firmware, but many others had to buy new hardware.

  1. Can you discuss the procurement and contracting approach you took with the various hardware and software elements discussed today?

Some of the procurements were sole-source and some were extensions of existing contracts WYDOT already had with partners. WYDOT did not do any RFPs; however, the NYC Pilot did do an RFP for their devices. See NYC’s RFEI here: http://www.nyc.gov/html/dot/downloads/pdf/nycdot-cvp-rfei-apr2017.pdf

  1. Where are the CV applications that WYDOT deployed physically housed? On the OBU? RSU?

Depends on the application. Some are housed at the TMC, while others are housed on the OBUs.

  1. Is the DSRC messaging limited to Basic Safety Messages or are other message types used as well?

TIM is the other message type used in the Pilot.

  1. Are you using bi-directional antennas or omni-directional antennas for the RSUs?

We are using horizontally polarized omnidirectional antennas.

  1. What is the absolute accuracy of your location data in the BSM messages?

We are not doing real time updates to GPS (no RTCM or augmentation). Accuracy is at lane-level or better for lat/long (typically 1.5 meters).

  1. How do the Green Hills SCMS hardware devices stay current? Is there an outside connection for those devices? Can WYDOT set their own certificates for trusted devices, or do those also have to be issued by Green Hills?

To prevent the havoc that a hacker could cause, only two weeks of certificates can be loaded at a time.

  1. What vehicular based data you are getting via CAN bus, just BSM portion 1, or also some of portion 2 as well?

We are using unknown fields from J2735.

  1. Which Standard BSM Messages are you getting from OBUs? Are you receiving any BSM messages from vehicles other than Pilot controlled vehicles?

To date we have only received messages from Pilot vehicles, this may change in the future though.

  1. Can you expand on the BSM 1/2 messages for the cab (power) and the trailer?

BSM Part 1 includes the vehicle length, width, height, power.
BSM Part 2 includes the pivot points for trailers.

  1. You mentioned 1900 routers. Are those field hardened and deployed in the field? Or are they going into a climate controlled enclosure?

The routers are in a climate controlled enclosure with heaters.