Bay Area Simulation and Ramp Metering Study

This report describes the first phase of an ongoing research project investigating the use of the Paramics traffic simulation model in freeway operation studies. Objectives of the research include: obtaining an in-depth knowledge of the Paramics model for freeway applications, developing and evaluating a calibration process assessing the model's ability to serve as a tool for evaluating freeway improvement strategies, and investigating various improvement strategies for the I-680 freeway in the San Francisco Bay Area. The report first describes the Paramics model and initial tests on simple hypothetical freeway networks. The preparation of the I-680 application is next described with the freeway site presentation and the assembling of input and performance data. The report then describes the calibration procedure and the ensuing calibration model and its validation process. The report also describes the design of the investigation of freeway improvement strategies, including ramp metering, added auxiliary lanes, and