This research investigates potential gap utilization at a minor street intersection entrance when connected and automated vehicles (CV) on the mainline are mixed with ordinary vehicles. Traffic responsive control through detection at the minor street entrance is commonly used for this type of intersection, which has often caused disruptions to the mainline traffic due to the need to serve the minor street vehicle on a first come, first serve basis. When a mainline CV is approaching the intersection, it can receive data from the roadside unit (RSU) and be instructed to adjust its speed, thus creating an opportunity for the minor street vehicle to enter the intersection without the need to terminate the green light for the mainline street. Gap characteristics are studied to help the design and implementation of responsive signal control schemes that utilize CV to create usable gaps among mainline vehicles when ordinary vehicles are waiting at the minor street to enter the intersection. Traffic flow analysis is conducted and math models developed to assess the effectiveness of the application in different traffic scenarios. Simulation tests are performed to verify the control logic and help identify conditions of vehicle distribution for model parameter definition. Field testing is carried out to demonstrate the feasibility of application and evaluate the impact of the integrated system.

CICTP