Evaluation of Transit Signal Priority in RBC and ASC/3 Software-in-the-loop Simulation Environment

In recent years, traffic simulation software packages have become powerful tools in developing and studying the impacts of different traffic scenarios. This was formerly impossible, or hardly achievable, in the field. This study presents a use of the VISSIM traffic simulation software in evaluating Transit Signal Priority (TSP) strategies using two types of emulated signal controllers. The first one is the Ring Barrier Controller (RBC), the most sophisticated traffic control emulator presented in the newly developed VISSIM versions. The other one is the Advanced System Controller series 3 (ASC/3) Software-in-the-Loop (SIL) traffic controller which runs from the same code base as the field ASC/3 controllers, thus enabling a high fidelity simulation of signal operations. The two signal control types were evaluated and compared for their abilities to provide TSP, and the impacts TSP causes on the overall traffic. The results have shown benefits of the evaluated traffic controllers within VISSIM in simulating TSP strategies, despite some differences and limitations with controller settings. On the test-case network, the results have shown reductions in transit travel times from 4 to 7%, which are assigned to TSP. Impacts on general purpose traffic along the main corridor were not observed, while TSP causes an increase in delays on side streets of approximately 1%, and an increase in the number of stops of approximately 0.5%. The results also showed some differences in the way the two controller types implement TSP strategies.


  • English

Media Info

  • Media Type: DVD
  • Features: Figures; References; Tables;
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01154407
  • Record Type: Publication
  • Report/Paper Numbers: 10-2664
  • Files: TRIS, TRB
  • Created Date: Jan 25 2010 11:17AM