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Environmental Impact Evaluation of Connected Vehicle End-of-Ramp Warning in Tampa, Florida Estimated That Annual Carbon Dioxide Emissions Were 240 Kilograms Lower in the Post-Deployment Period.

Methodology The results from a deployed use case, congestion reduction and collision avoidance due to queuing on the exit ramp from the Reversible Express Lanes (REL) during the morning peak, were…
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Date Posted
11/30/2022

Connected Vehicle Speed Limit Warnings Increased Speed Compliance by 16 Percent During a Pilot Test in New York City.

METHODOLOGY The deployed vehicles experienced 107,609 alerts by V2I applications and 52,680 by V2V applications. Of all these events, 65,231 alerts were silent and 95,058 alerts were active. After…
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Date Posted
11/28/2022

NYC Connected Vehicle Pilot Found That 83 Percent of Participants Felt Safer When Using the Mobile Pedestrian Crossing App Compared to Not Using It.

METHODOLOGY The NYC CV pilot deployment collected 189,374 total events (defined as a warning, alert, or some other triggering parameter within the vehicle) from January 2021 to November 2021. All…
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Date Posted
05/28/2022

Leverage Relative Accuracy of GPS for Detecting Lane Departure and Road Direction.

Below are the lessons that can be taken from this study:  Relative accuracy of a standard GPS receiver can be leveraged for detecting lane departures. Although the error in absolute position…
Content type
Date Posted
11/24/2021

A Proof-of-Concept System to Provide V2I Smartphone-based Curve Speed Warnings was Developed in a Research Project that Cost under $80,000.

Minnesota Department of Transportation sponsored a research project to develop a prototype dynamic curve speed warning application using cloud-based V2I communications. The system consisted of a…
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Made Public Date
11/24/2020

A Cloud-Based Dynamic Warning System Can Enable Curve Warnings at Locations where Field Infrastructure would Otherwise be Costly.

Existing dynamic warning systems rely on roadside infrastructure and are often only deployed at high crash locations due to cost factors. A cloud-based system can be used to enable information from…
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Date Posted
11/24/2020

In-vehicle visual and audible safety alerts improved speed limit compliance and reduced driver speeds in Minnesota study.

Methodology The in-vehicle safety alerts used two different kinds of alerts: visual and audible. Visual alerts showed the same traffic control device on the smartphone as appeared on the roadside (e…
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