Lessons

Latest Lessons Learned Updates

Establish a System-wide Inventory of Traffic Signal System Technology to Improve Evaluation Capabilities and Effectively Monitor Agency Investments.
Date Posted: 10/26/2021 | Source Date:
Emphasize Sensor Placement and Message Board Visibility When Installing Queue Warning Systems to Ensure Driver Viewability.
Date Posted: 10/26/2021 | Source Date:
Modify Boundaries by Direction and Use High Resolution GPS to Create Better Geo-Fencing for School Zone Speed Monitoring Mobile Applications.
Date Posted: 10/26/2021 | Source Date:
The Distance Between Consecutive Variable Speed Advisory (VSA) Signs Installed on State Highways Should Not Be Greater Than One-Half Mile According to a Caltrans Field Study.
Date Posted: 10/22/2021 | Source Date:
Arizona Study Suggests Revising Pedestrian Hybrid Beacon Location Criteria to Include Roadways with Speed Limits of Up To 50 MPH and Latent Crossing Demand.
Date Posted: 09/28/2021 | Source Date:
Three Scenarios in Traffic Jam Assist System Simulation Recommend Adjusting Lane Change Onset Threshold Values from 0.02 to 0.03g for Better Accuracy.
Date Posted: 09/28/2021 | Source Date:
An Evaluation of Three Work Zone Intrusion Alarm Systems in California Provided Suggestions to Enhance Visual, Sound, and Sensor Components.
Date Posted: 09/28/2021 | Source Date:
Recognize Limitations in Passive Radio Frequency Identification Tag Reading Distance and Driving Speed When Selecting Technologies for Traffic Sign Asset Management.
Date Posted: 09/26/2021 | Source Date:
Deploying More Road Weather Information System Sites Having Basic Capabilities Located Near Maintenance Section Boundaries Is More Beneficial than Fewer Sites with More Sensors.
Date Posted: 08/30/2021 | Source Date:
Designing Questions about Speed in Several Different Ways May Help Improve the Usefulness of Automated Shuttle Survey Results, as Low Speeds Have a Complicated Relation to User Acceptance.
Date Posted: 08/25/2021 | Source Date:
ITS Deployment Evaluation

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