Gao, Hang; Shenyang Cheng; and Michael Zhang
Benefit Summary HTML

Applications of model-based Variable Speed Limit (VSL) control have shown promise in resolving capacity drops and time delays for a single location with recurring bottleneck conditions. Researchers studied the application of VSL controls to a broader scenario, freeway corridors with multiple segments and multiple bottlenecks. With the objective of reducing fuel consumption and greenhouse gas emissions, three VSL control scenarios were developed and compared: static speed limit (no VSL), flow-based control, and density-based control. The flow-based fuel consumption centered VSL control strategy was designed based on the characteristics of shockwaves between adjacent bottlenecks to suppress the negative shockwave effects and maintain a fuel-efficient speed in the controlled segments.  The second density-based strategy was designed to keep the density of freeway segments around an optimal level by managing the difference between optimal density and actual density. 

Created Date
Hyperlink Exit Door
Priority Research Area
Publication Sort Date
Prepared by the University of California, Davis for Pacific Southwest Region University Transportation Center
Result Type
Get More Out of Variable Speed Limit (VSL) Control: An Integrated Approach to Manage Traffic Corridors with Multiple Bottlenecks
Project Category
External URL Disclaimer

(Our website has many links to other organizations. While we offer these electronic linkages for your convenience in accessing transportation-related information, please be aware that when you exit our website, the privacy and accessibility policies stated on our website may not be the same as that on other websites.)