PROGRESSION-BASED OPTIMIZATION MODEL IN TRANSYT-7F

The forward progression opportunities (PROS) concept has been developed as an alternative for design and evaluation of arterial signal timing. The concept expands upon the maximal bandwidth approach by considering time-space progression opportunities that do not necessarily extend throughout the length of the route. Further, PROS can be available for traffic outside the through bands of the traditional time-space diagram. PROS can be used alone or in conjunction with system disutility measures (such as stops, delay, and fuel consumption) for a more complete progression design. The implementation of the PROS concept for application on multiple arteries within networks, using TRANSYT-7F, is presented. Data are presented to demonstrate the performance of the model relative to other optimization strategies. Experiments with the model indicate that it can produce significant improvements over both the traditional bandwidth and disutility methods for designing arterial and network signal timing plans.