Variable speed limit (VSL) systems have been used in a number of countries, particularly in Europe, as a method to improve flow and increase safety. VSLs use detectors to collect data on current … [Read more...] about Work Zone Variable Speed Limit Systems: Effectiveness and System Design Issues
Virginia Transportation Research Council
Evaluation of Best Practices in Traffic Operation and Safety: Phase I: Flashing LED Stop Sign and Optical Speed Bars
In a previous extensive review of overseas literature, researchers identified 42 traffic operations and safety technologies and practices that were not currently deployed in Virginia. These were … [Read more...] about Evaluation of Best Practices in Traffic Operation and Safety: Phase I: Flashing LED Stop Sign and Optical Speed Bars
Use of Police in Work Zones on Highways in Virginia: Final Report
It is generally accepted that one of the most effective ways of controlling speed in a work zone is to have a staffed police car positioned at the beginning of the work zone with its lights flashing … [Read more...] about Use of Police in Work Zones on Highways in Virginia: Final Report
A Determination of the Appropriateness of Virginia’s Retroreflective Sign Sheeting Specification for Flourescent Orange Construction and Maintenance Signs
To ensure the safe and efficient movement of traffic through a highway network during nighttime conditions, traffic signs are either illuminated or made retroreflective. Since illuminating all highway … [Read more...] about A Determination of the Appropriateness of Virginia’s Retroreflective Sign Sheeting Specification for Flourescent Orange Construction and Maintenance Signs
Estimation of Traffic Impacts at Work Zones: State of the Practice
This study was conducted to provide the Virginia Department of Transportation (VDOT) with the state-of-the-practice tools that are available and used by other state agencies for estimating the traffic … [Read more...] about Estimation of Traffic Impacts at Work Zones: State of the Practice
Deflection Limits for Temporary Concrete Barriers
Whenever a traffic control plan is developed that utilizes temporary barriers, it is important to define acceptable barrier deflection criteria. However, the acceptable deflection criteria can be … [Read more...] about Deflection Limits for Temporary Concrete Barriers