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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

Variable Speed Limit (VSL) System Using AI-Based Algorithm Reduced Traffic Speed Variations by 32.7 Percent to Improve Safety at the Expense of a Slight 6.5 Percent Increase in Vehicle Hours of Delay on I-24 in Nashville.

METHODOLOGY Researchers obtained data from commonly available Radar Detection Systems (RDS) on highways to shape the state input of each VSL controller unit. Regarding the action space of the agents…
Content type
Benefit
Date Posted
04/23/2024
Taxonomy (ARC-IT) Variable Speed Limits (TM20)
Geolocation links
Nashville, Tennessee, United States

Adopt Different Machine Learning (ML) Models to Predict Congestion Measures for Rural and Urban Areas Based on Modeling Performance Differences and Utilize Explainable ML for Enhanced Interpretation.

Adopt different ML models to predict congestion measures for rural and urban areas based on the performance differences. This study found better performance of rural freeway models as compared to…
Content type
Lesson
Date Posted
03/22/2024
Taxonomy (ARC-IT) Data Management, Performance Monitoring (DM02), Regional Traffic Management (TM07)
Geolocation links
Texas, United States

Conduct Durability Tests to Ensure Antenna Mounting Supports Proper Connected Vehicle Communications for Large Vehicles.

Conduct interoperability test to identify potential issues that would require resolution prior to the sites advancing to an operational phase. The three-day testing event was a major victory for the…
Content type
Lesson
Date Posted
02/29/2024
Taxonomy (ARC-IT) Connected Vehicle System Monitoring and Management (SU01), ITS Communications (SU07), Connected Vehicle Traffic Signal System (TM04)
Geolocation links
Wyoming, United States   |   New York City, New York, United States   |   Tampa, Florida, United States

Coordinate Long-Term Planning Schedules and Goals to Enhance Data Exchange and Collaborative Efforts Among Multiple Metropolitan Planning Organizations (MPOs).

Coordinate long-term planning schedules and goals to enhance collaborative efforts. Beginning with manageable projects and tracking their progress and results in a transparent fashion helps…
Content type
Lesson
Date Posted
02/29/2024
Taxonomy (ARC-IT) Regional Traffic Management (TM07), Integrated Decision Support and Demand Management (TM09)
Geolocation links
Florida, United States

Consider Data Collection Capability When Selecting Performance Measures for Mobile Device-Based Systems.

Identify local stakeholder and transportation infrastructure needs. This could be best achieved by outreach efforts with stakeholder engagement and technical working group meetings to ensure…
Content type
Lesson
Date Posted
01/31/2024
Taxonomy (ARC-IT) Connected Vehicle System Monitoring and Management (SU01), ITS Communications (SU07), Security and Credentials Management (SU08), Vulnerable Road User Device Transition Support (SU15), Traffic Information Dissemination (TM06), Personal Wayfinding (TI08), Vulnerable Road User Safety (VS12)
Geolocation links
Nationwide, 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
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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