Displaying 1 - 10 of 34

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Leverage Supplementary Communication Protocols To Disseminate Traveler Information Messages (TIMs) Beyond the Deployment Region To Maximize Impacts of Connected Vehicle Technologies.

Leverage supplementary communication protocols to disseminate traveler information messages (TIMs) beyond the deployment region to maximize CV impacts. When there were a limited number of roadside…
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Date Posted
04/28/2023

Field Test of Automated Vehicles in Adverse Weather Found Radar and Camera Systems Were Still Susceptible to Rain and Ice, But Not as Consistently as the Vision-only System.

Rain and water on the pavement do not disrupt vehicles’ abilities to sense lane lines in most cases. In the vast majority of test runs, vehicles were able to detect the lane line and steer back into…
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Date Posted
09/27/2022

A Driver Simulator Study on a Smartphone Based Pedestrian-to-Vehicle Warning Technology Demonstrated That Providing Additional Distance Information Leads to Improved Safety and Driving Performance.

Provide additional distance information to improve driving comfort. This study tested whether adding the distance indicator and the color of the warning icon, which would be changed according to…
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Date Posted
05/31/2022

The NYC CV Pilot project’s innovative use of lasers generated a precise, repeatable way of verifying the accuracy of a vehicle’s location in their efforts to overcome the GPS limitations of the City’s urban canyons.

To correct for this, the NYCDOT CV Pilot team is using an enhanced V2X-locate positioning engine to improve location accuracy. By measuring the time-of-flight from Roadside Units (RSU),…
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Date Posted
10/28/2020
Taxonomy (ARC-IT) Freight Administration (CVO02)

Validate the performance of dedicated short-range communication (DSRC) radios for cooperative adaptive cruise control (CACC) applications by testing receiver signal strength, signal delay, and packet error rates.

FINDINGS Based on the test track results the Volpe Center offered several recommendations for features of the CACC-based vehicle platooning system. Design of Vehicle Platooning Proof-of-Concept…
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Date Posted
11/18/2019

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

Each of the three Connected Vehicle Pilot Deployment sites (Wyoming, Tampa, NYC), while unique regarding size, features, and functionality to be deployed, are all examples of large disparate systems…
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Date Posted
09/13/2018

Develop a good understanding of what is available from the SCMS and RSU/OBU vendors and develop a system of systems that supports end-to-end testing.

Below, the Wyoming CV Pilot team shares key lessons that were learned during Phase 1 planning activities. These are shared with USDOT and other agencies that may be endeavoring to initiate a…
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Date Posted
05/08/2018

Conduct bench testing prior to field installation of transit signal priority (TSP) equipment to verify functionality between detectors, signal controllers, phase selectors, and cabinet design.

The lessons learned from the field installation, testing, and evaluation of the TSP system: Select a TSP technology compatible with existing traffic signal controllers and the existing bus AVL…
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Date Posted
09/26/2017
Taxonomy (ARC-IT) Transit Signal Priority (PT09)

Invest in automated bicycle-pedestrian counters to both save time over doing manual counts and provide the ability to track continuous data over longer periods of time.

Throughout the course of the pilot, participating MPOs were able to establish baseline automated count programs, demonstrating that count programs can be initiated with a relatively small amount of…
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Date Posted
08/30/2017

Periodically assess the accuracy and reliability of parking management vehicle sensors and predictive algorithms to assure performance under a variety of weather conditions and traffic situations.

Key Lessons from the operational period were as follows: Verify that magnetometers can accurately record vehicles entering in rapid succession to prevent "under-counting" Performance of the vehicle…
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Date Posted
08/30/2017