In order to analyze the conflict characteristics of interchange diversion connection, the applicability of SSAM (Surrogate Safety Assessment Model) model with TTC in China is analyzed, and the advantages of DRAC are discussed. Based on the normal deceleration observation and emergency braking test of vehicles on freeway general sections, interchange exits and entrances, and toll stations, the DRAC representing the conflict severity are calibrated for Chinese Drivers. The paper simulates the length of different deceleration lanes and the number of lanes in connection section, obtains the traffic conflict characteristics corresponding to different connection of interchange, and guides the geometric design of the interchange connection.

CICTP