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Cooperative Intelligent Transport System Pilot in Finland Revealed a 90–98 Percent Success Rate in the Delivery of Safety Messages at a Transmission Frequency of 10 Hz.

METHODOLOGY This study evaluated the deployment and performance of C-ITS pilot service alerts in a real-world environment using a structured, multi-phase methodology. The evaluation scope covered…
Content type
Benefit
Date Posted
10/30/2025
Taxonomy (ARC-IT) Work Zone Management (MC06), Dynamic Roadway Warning (TM12), Road Weather Motorist Alert and Warning (VS07)
Geolocation links
Sodankylä

Iowa Field Test Study Showed a Combination of Dynamic Message Signs and Fixed Signs Reduced Tailgating by 29 Percent in a Construction Zone.

METHODOLOGY This study began by creating many different styles of warning messages designed to increase driver gap acceptance in work zones. It experimented with messages that were numerical versus…
Content type
Benefit
Date Posted
07/29/2024
Taxonomy (ARC-IT) Work Zone Management (MC06), Dynamic Roadway Warning (TM12)
Geolocation links
Cedar Rapids, Iowa, United States

Utah Study Found That Variable Message Signs Increased Traffic Diversion Rates by 18 Percent During Incidents.

METHODOLOGY In this study, the researchers first performed a before-and-after study to measure the effect of VMS on Utah freeway diversion rates during incidents, focusing on the freeway I-15. After…
Content type
Benefit
Date Posted
05/31/2024
Taxonomy (ARC-IT) Integrated Decision Support and Demand Management (TM09), Dynamic Roadway Warning (TM12), Weather Data Collection (WX01)
Geolocation links
Utah, United States

Conduct Yearly Solar Panel Maintenance Including Surface Cleaning and Charging Output Tests When Using Solar Powered Intelligent Warning Devices

Conduct yearly solar panel reviews including surface cleaning and charging output tests when using any solar powered systems. While these systems often use maintenance-free batteries, it is…
Content type
Lesson
Date Posted
01/31/2024
Taxonomy (ARC-IT) Dynamic Roadway Warning (TM12), Speed Warning and Enforcement (TM17), Vulnerable Road User Safety (VS12)
Geolocation links
Minnesota, United States

Driving Simulation Study on V2I Technologies Found Audio Warnings Effective in Reducing Driver Speed by Approximately 11.4 Percent.

METHODOLOGY In this study, four specific scenarios were tested in driver simulation: (i) BASE: Heavy rain without warning, (ii) AUDIO: Heavy rain with in-vehicle audio warning, (iii) SCREEN: Heavy…
Content type
Benefit
Date Posted
12/27/2023
Taxonomy (ARC-IT) Dynamic Roadway Warning (TM12), Autonomous Vehicle Safety Systems (VS01)
Geolocation links
Louisiana, United States   |   Nationwide, United States

Advanced Queue Detection Systems Installed at Four Work Zones in Nebraska Were Estimated To Cost $166,225 per Work Zone for a 6-Month Project on I-80.

The system cost analysis was based on a typical AQD system including one CCTV camera, three non-intrusive detection, and two pairs (total of four) of PDMS. Based on an estimation of six-month…
Content type
System Cost
Made Public Date
12/22/2023
Taxonomy (ARC-IT) Dynamic Roadway Warning (TM12), Queue Warning (VS08)
Geolocation links
Nebraska, United States

Australian Study on Cooperative ITS Technologies Showed a Four to Nine Percentage Point Increase in Technology Usefulness Rating, Based on User Questionnaires Comparing Control and Treatment Groups.

METHODOLOGY The participants were randomly assigned into either of two groups: Treatment Group that had an HMI receiving warnings, and Control Group that had an inactive HMI. Over nine months, both…
Content type
Benefit
Date Posted
12/18/2023
Taxonomy (ARC-IT) Dynamic Roadway Warning (TM12), Autonomous Vehicle Safety Systems (VS01), Queue Warning (VS08), Reduced Speed Zone Warning / Lane Closure (VS09), Vulnerable Road User Safety (VS12)
Geolocation links
Ipswich

University of Florida Study of Leading Pedestrian Indicator (LPI) Implementation Found a Range of 25 to 100 Percent Reduction in Vehicle-Pedestrian Conflicts at Test Locations.

Methodology Preliminary LPI implementation guidelines were developed after input was collected among experienced traffic engineers and FDOT District representatives through surveys, interviews, and…
Content type
Benefit
Date Posted
11/28/2023
Taxonomy (ARC-IT) Transit Pedestrian Indication (PT11), Dynamic Roadway Warning (TM12), Vulnerable Road User Safety (VS12)
Geolocation links
Florida, United States

Advanced Queue Detection System Using Portable Dynamic Message Signs Reduced Speeds of Vehicles Approaching Interstate Work Zones in Nebraska by up to Seven Miles Per Hour.

METHODOLOGY In this study, portable traffic data capturing units, consisting of cameras and Wi-Fi receivers as detectors, were utilized through a private company. Cameras within the portable units…
Content type
Benefit
Date Posted
06/30/2023
Taxonomy (ARC-IT) Dynamic Roadway Warning (TM12), En-Route Guidance (TI03), Queue Warning (VS08)
Geolocation links
Statewide, Nebraska, United States
ITS Deployment Evaluation

1200 New Jersey Avenue, SE
Washington, DC 20590

its.dot.gov

U.S. Department of Transportation Office of the Assistant Secretary for Research and Technology (OST-R)
 
 
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