Lesson

Consider installing additional vehicle detection equipment if it is determined that there is not sufficient market penetration for CV traffic signal control applications to work at their full potential

Success Stories from the USDOT’s Connected Vehicle Pilot Program


11/01/2017
Tampa,Florida,United States


Background (Show)

Lesson Learned

The THEA project involves installing radios and computers in over 1600 vehicles (including private cars, buses, and streetcars) and in over 40 fixed locations at downtown intersections to enable ultra-fast vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I) and smart phone-to-infrastructure communication.

For the pilot, THEA is installing "intelligent" traffic signal controllers to help improve the flow of traffic. As THEA moved into the design phase, the project engineers delved into the details of signal optimization with the designers of the signal control process at the University of Arizona. They learned that signal control optimization can reach its full potential only when over 90% of the vehicles approaching the intersection have known location and speeds. The number of vehicles instrumented for V2I communication as part of the CV Pilot program would provide a far smaller percentage of vehicle coverage.

Florida Department of Transportation (FDOT) District 7 and HNTB (THEA’s General Engineering Consultant) came to the rescue with a method for obtaining information on all vehicles approaching the instrumented intersections. After considering several technologies, including loop detectors and microwave detectors, FDOT agreed to pay for the procurement and installation of over 40 video traffic detectors at 12 intersections along Florida Ave. and Nebraska Ave. as part of a Joint Partnering Agreement with THEA. HNTB will provide the design to integrate them with the rest of the CV pilot operation under its existing contract, at no cost to the CV Pilot program. THEA will provide ten "Bluetooth" detectors to determine travel time between points on these streets and along Meridian Avenue. These detection technologies will pick up the needed number of unequipped vehicle without identifying or retaining any information about individual drivers or vehicles.


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Source

Connected Vehicle Pilot Deployment Program: Success Stories

Author: Glassco, Rick; James O'Hara; Barbara Staples; Kathy Thompson; and Peiwei Wang

Published By: USDOT Office of the Secretary for Research and Deployment

Source Date: 11/01/2017

URL: https://www.its.dot.gov/pilots/success_lessonslearned.htm

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Lesson Analyst:

Kathy Thompson


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Lessons From This Source

Allow for increased coordination with the Interdepartmental Radio Advisory Committee (IRAC) early on in the DSRC licensing process to help reduce what is traditionally a very lengthy process.

Connected Vehicle Pilot Deployment Program yields program management best practices for integrating and testing large disparate systems.

Connected vehicles should rely on more than one data feed to determine accurate location and speed

Consider installing additional vehicle detection equipment if it is determined that there is not sufficient market penetration for CV traffic signal control applications to work at their full potential

Facing a gap in standards interpretation, the Tampa and New York City Connected Vehicle Pilot Sites worked together to harmonize message structure for pedestrian safety applications.

For pedestrian safety warning applications, opt to collect pedestrian location data from LIDAR sensors instead of pedestrian mobile devices that often have insufficient accuracy.

Incentivize participation in CV deployments through benefits such as toll discounts

Include technical, operations, and legal personnel in stakeholder meetings to address the requirements of the CV deployment and ensure that participants' privacy is being maintained

Incorporate standardized over-the-air update procedures to permit efficient firmware updates for connected vehicle devices.

Obtain working prototypes of CV applications from the USDOT’s Open Source Application Data Portal (OSADP) to prevent time spent doing duplicative software development

Prevent the need for channel switching (a safety hazard) by designing CV communications to include dual radios in each vehicle

Publish all CV planning documentation to serve as an example for other early deployers to follow

The Tampa Connected Vehicle Pilot Program investigates damage to roadside units (RSUs) near lightning strikes and improves transient surge immunity by verifying nearby support structures are properly grounded.

The USDOT’s three Connected Vehicle Pilots successfully demonstrate cross-site over-the-air interoperability among six participating vendors.

Use local student mechanics where possible to perform CV equipment installations to provide students with required trainee experience and to contain costs

Use on-board connected vehicle (CV) technology and SPaT / MAP infrastructure messages to prevent wrong way entries on reversible express lanes.

When installing antennas on streetcars to support wireless connected vehicle applications, verify that radio performance is not compromised by interference from high-voltage power lines.

States

Florida

Countries

United States

Systems Engineering

Show the V

None defined

Goal Areas

Efficiency

Keywords

coordinated signals, signal coordination, centralized signal control, signal synchronization, traffic signals, advanced signal control, signal timing optimization, coordinated signal control, advanced signal controller, traffic signal retiming, retiming

Lesson ID: 2017-00793