The Evaluation of Level of Service for Expressway in Operating Stage

摘要

Because expressway construction has recently progressed rapidly in China, traffic management needs more efficiency. So we urgently need to study the expressway system’s level of service (LOS) evaluation methods. In the planning, design, and operating stages, our aims in evaluating LOS and the data to be used were different, and we have accordingly adopted different evaluation methods for each stage. This paper investigates the LOS evaluation method in the operating stage, evolving a model to estimate travel speed based on the dual loop detectors that were developed, to verify the precision of the model. We have proved that it is feasible to replace the data of the section with that of lane 2 for analysis. Taking the travel speed index as a service measure, we developed a quantitative method for evaluating expressway LOS, and we developed procedures for operating quality analysis. We also successfully applied this method to an example.