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Lab-Test Results Showed that Vision-Based Red Light Violation Warning Application Combined with Assured Green Period Could Reduce Red-Light Running by 93 Percent.

METHODOLOGY The test plan for three applications considered two RSE configurations: one using FHWA's open source V2X Hub middleware, the other relying on built-in RSE features. Two data capture…
Content type
Benefit
Date Posted
04/25/2024
Taxonomy (ARC-IT) Connected Vehicle Traffic Signal System (TM04), Intersection Safety Warning and Collision Avoidance (VS13)

An Active Safety-Collision Warning Pilot in Washington State Estimated a Potential Upper Bound of Annual Total Net Benefits Between $1.1M and $2.1M Due to Prevention of Collisions with Vehicles, Pedestrians, and Bicyclists.

METHODOLOGY The first phase of this project involved equipping 38 transit buses with the CAWS. The buses traveled 352,129 miles during 23,798 operating hours from April 1, 2016 to June 30, 2016.…
Content type
Benefit
Date Posted
10/30/2023
Taxonomy (ARC-IT) Autonomous Vehicle Safety Systems (VS01), Vulnerable Road User Safety (VS12), Intersection Safety Warning and Collision Avoidance (VS13)
Geolocation links
Washington, United States

European Study on Cooperative Intelligent Transport Systems (C-ITS) Estimated a Safety Benefit of 3,932 to 8,774 Avoided Deaths Across the European Union by 2040.

METHODOLOGY The three different communication solutions considered in this study to assess the potential benefits from the two use cases were specifically: (1) LTE-PC5: Communication solution that…
Content type
Benefit
Date Posted
10/30/2023
Taxonomy (ARC-IT) Vulnerable Road User Safety (VS12), Intersection Safety Warning and Collision Avoidance (VS13)
Geolocation links
European Union

Incorporate Typical Driver Reactions and Countermeasures into Algorithms Developed for Collision Avoidance Warning Systems and Automated Emergency Braking to Reduce Unnecessary In-vehicle Warnings.

The lessons learned from this project include Return on Investment (ROI) for CAWS/AEB, testing procedures, the importance of bus original equipment manufacturer (OEM) involvement, transit research…
Content type
Lesson
Date Posted
09/29/2023
Taxonomy (ARC-IT) Vulnerable Road User Safety (VS12), Intersection Safety Warning and Collision Avoidance (VS13)
Geolocation links
Washington, United States

Simulation Results Revealed a V2I-based Speed Advisory System Increased the Minimum Time to Collision by an Average of 1.2 Seconds.

METHODOLOGY This study examined the effects of varying levels of SAS MPR (0%, 25%, 50%, 75%, 100%) on rear-end collision risks. Real vehicle trajectories, vehicle lengths, and signal timing were…
Content type
Benefit
Date Posted
03/24/2023
Taxonomy (ARC-IT) Speed Warning and Enforcement (TM17), Intersection Safety Warning and Collision Avoidance (VS13)
Geolocation links
Atlanta, Georgia, United States

Manage Deployment Risks Related to Connected Vehicle Technology Maturity by Reducing Exposure to External Uncertainties and Adding Testing at an Earlier Stage.

Broaden the definition and concept of technical maturity to increase stakeholder knowledge and allow for better risk management. The lack of technology maturity resulted in challenges such as…
Content type
Lesson
Date Posted
12/28/2022
Taxonomy (ARC-IT) V2V Basic Safety (VS02), Intersection Safety Warning and Collision Avoidance (VS13)
Geolocation links
Wyoming, United States   |   New York City, New York, United States   |   Tampa, Florida, United States

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…
Content type
Benefit
Date Posted
11/28/2022
Taxonomy (ARC-IT) Autonomous Vehicle Safety Systems (VS01), V2V Basic Safety (VS02), Curve Speed Warning (VS05), Intersection Safety Warning and Collision Avoidance (VS13)
Geolocation links
New York City, New York, United States

Simulation Results Showed That Stop Sign Gap Assist Applications for Connected and Automated Vehicles Can Improve Capacity on Minor Approaches by up to 35.5 Percent; However, There was a Clear Trade-Off Between Capacity and Safety Benefits.

 METHODOLOGY Several existing case studies were investigated to assess existing models and simulation development methods, document the data needs of agencies dealing with ATVs, general guidance…
Content type
Benefit
Date Posted
10/20/2022
Taxonomy (ARC-IT) Autonomous Vehicle Safety Systems (VS01), V2V Basic Safety (VS02), Stop Sign Gap Assist (VS06), Intersection Safety Warning and Collision Avoidance (VS13), Automated Vehicle Operations (VS16)
Geolocation links
Nationwide, United States

Simulation Analysis of Connected Vehicle Signalized Left Turn Assist Technology Shows Up to a 58.4 Percent Reduction in Left Turn Delays and Reduced Crossing Conflicts.

Methodology Researchers used modeling techniques to assess the potential benefits of SLTA. To calibrate a simulation model, researchers utilized video data collected from five intersections in the…
Content type
Benefit
Date Posted
08/24/2022
Taxonomy (ARC-IT) V2V Basic Safety (VS02), Intersection Safety Warning and Collision Avoidance (VS13)
Geolocation links
San Francisco, California, United States

Simulator Study Finds That Drivers Reduced Visual Scanning Behavior at Intersections when Using Assistive Systems.

Methodology Using 24 licensed driver participants driving in a simulated city environment, CAVIMAS was used to analyze behavior in three common intersection-related crash types, left turn across path…
Content type
Benefit
Date Posted
07/27/2022
Taxonomy (ARC-IT) Autonomous Vehicle Safety Systems (VS01), Intersection Safety Warning and Collision Avoidance (VS13)
Geolocation links
Michigan, United States
ITS Deployment Evaluation

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