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Dynamic Speed Feedback Signs (DSFS) Can Lower Ramp Curve Entry Speeds by 4.5 mi/h Reducing Risk of Lane Departures When Installed 250 ft to 400 ft Upstream of Freeway Interchange Exit Ramps.

METHODOLOGY This study examined three commercially available DSFS signs at six different freeway interchange ramps in Michigan. The evaluation tested several aspects of the DSFS, including physical…
Content type
Benefit
Date Posted
04/24/2024
Taxonomy (ARC-IT) Speed Warning and Enforcement (TM17)
Geolocation links
Saugatuck

Evaluation of Existing Digital Message Signs in Michigan Revealed a 5.66 mph Reduction in Speed after Seeing the Weather-Related Message on Traffic Speeds.

METHODOLOGY Several field case studies were conducted to understand the effectiveness of particular messages and types of DMS, including weather-related DMS messages on driver speeds; exploring the…
Content type
Benefit
Date Posted
08/31/2023
Taxonomy (ARC-IT) Work Zone Management (MC06), Traffic Information Dissemination (TM06), Weather Information Processing and Distribution (WX02)
Geolocation links
Grand Rapids, Michigan, United States   |   Saginaw, Michigan, United States

Michigan Digital Message Sign Study Reported an Installation Cost of $72,000 and an Annual Operation Cost of $2,300.

Digital Message Signs (DMS) (also referred to as dynamic message signs, variable message signs, or changeable message signs) are an important part of the Advanced Traveler Information Systems (ATIS)…
Content type
System Cost
Made Public Date
08/31/2023
Taxonomy (ARC-IT) Traffic Information Dissemination (TM06), Weather Information Processing and Distribution (WX02), Work Zone Management (MC06)
Geolocation links
Grand Rapids, Michigan, United States   |   Saginaw, Michigan, United States

Consider Automating Weather-Related Messages on Digital Message Sign Systems, in Addition to Travel Times, Using Data from Environmental Sensor Stations.

Consider automating weather-related messages, in addition to travel times. This study clearly demonstrated that it is possible to automate the display of weather-related messages using Environmental…
Content type
Lesson
Date Posted
08/31/2023
Taxonomy (ARC-IT) Work Zone Management (MC06), Traffic Information Dissemination (TM06), Weather Information Processing and Distribution (WX02)
Geolocation links
Grand Rapids, Michigan, United States   |   Saginaw, Michigan, United States

A Dynamic Speed Feedback Sign (DSFS) is Most Effective at Reducing Vehicle Speeds on a Freeway Ramp When the Sign is Placed 250 Feet After the Start of the Ramp Curve.

Ensure a minimum of 250 feet radar activation range. This study found strong sign-related effects associated with the radar detection range. With the DSFS installed near the start of the curve, the…
Content type
Lesson
Date Posted
09/16/2022
Taxonomy (ARC-IT) Speed Warning and Enforcement (TM17)
Geolocation links
Michigan, United States

Network-Level Evaluation Tool Showed that ITS Deployments in Michigan Reduced Traffic Network Delays by 18.6 Percent and Traffic Safety Costs by 4.0 Percent.

METHODOLOGY This study developed a robust planning-level benefit/cost calculation methodology that used various existing roadway data resources (average annual daily traffic, congestion data etc.),…
Content type
Benefit
Date Posted
07/29/2022
Taxonomy (ARC-IT) Infrastructure-Based Traffic Surveillance (TM01)
Geolocation links
Michigan, 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

Use Mobile Road Weather Information Sensors and Maintenance Decision Support Systems to Reduce Material Usage and Increase Cost Savings for Winter Road Maintenance Operations.

Use mobile RWIS and MDSS to reduce material usage and increase cost savings. CDOT reported that districts that used mobile RWIS reported an approximate 20 percent reduction in material usage,…
Content type
Lesson
Date Posted
05/31/2022
Taxonomy (ARC-IT) Winter Maintenance (MC04), Weather Data Collection (WX01), Weather Information Processing and Distribution (WX02)
Geolocation links
Colorado, United States   |   Indiana, United States   |   Michigan, United States   |   Minnesota, United States
ITS Deployment Evaluation

INTELLIGENT TRANSPORTATION SYSTEMS JOINT PROGRAM OFFICE

1200 New Jersey Avenue, SE
Washington, DC 20590

its.dot.gov

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