Variable Speed Limit for Freeway Work Zone with Capacity Drop Using Discrete-Time Sliding Mode Control

Freeway work zone with lane closure has a direct negative impact on travel time, safety, and environmental sustainability. The capacity drop at the onset of the congestion can also further reduce the discharging rate at the work zone area and worsen traffic conditions. Existing studies have developed various variable speed limit (VSL) control methods to mitigate the congestion; however, a simple yet robust VSL control strategy that considers …