Urban network traffic simulation: TRAF-NETSIM program

The network simulation program NETSIM is now a component model of the integrated traffic simulation system TRAF. The current version of the model is therefore referred to as the TRAF-NETSIM program. As part of an effort aimed at developing, maintaining, and supporting the TRAF simulation system, TRAF-NETSIM has been extensively modified over the past five years. Four new features have been added to the TRAF-NETSIM simulation program: actuated controller logic, identical traffic streams, conditional turning movements, and signal transition. Several major modifications have also been made to the simulation logic to resolve the problems encountered during the testing of the simulation program; to enhance the logic to represent complex decision processes; and to enhance and extend the input-output capabilities, user-interaction, and the computational efficiency of the program. These new features and the modifications incorporated in the TRAF-NETSIM simulation model are described in this paper.