摘要
This research aimed at evaluating traffic improvement options for urban street networks using traffic simulation. Traffic, geometric and control data were collected from a selected study area which consisted of eight major at-grade intersections in Irbid city, Jordan, and the traffic simulation software （CORSIM） was used to evaluate the proposed traffic improvement options. The results of the network level analysis showed that the scenario of two rings of one-way streets provided the highest average travel speed （40% increase） and the lowest average traffic delay （47% reduction） as compared to the existing condition. It was found that a network with moderate intersections traffic volumes performs better with roundabouts than with signals. Replacing the network roundabouts by coordinated and optimized traffic signals provided more improvement in the average travel speed than the average traffic delay.
