Integrated Traffic Simulation Model - Phase I. Volume 4: Revisions to UTCS-1 Traffic Simulation Model to Enhance Operational Effectiveness

摘要

This report describes revisions to the UTCS-1 Traffic Simulation Program to reduce computing (CPU) time, reduce data transfer (I/O) operations, and to reduce storage requirements. The work effort included the refining of the existing code; Incorporating the capability for a variable simulation time-step; Abridging the existing fuel consumption and vehicle emission rate tables; Packing the above tables to conserve storage; and Revising two major routines and developing a new car-following model. The estimated result is to reduce CPU time by at least 30 percent, reduce I/O operations by at least 90 percent and reduce required storage by approximately 10 percent.