VALIDATION OF SIMULATION SOFTWARE FOR MODELING LIGHT RAIL TRANSIT

As the engineering and planning communities continue their progress toward managed and integrated transportation systems, transit will play an increasing role. Light rail transit (LRT) has already been selected and implemented by 15 U.S. cities as a rail transit alternative. As new or expanded systems are planned and designed, it is essential that engineers have the means to make the best decisions for LRT placement and operations. The purpose of this research study was to investigate the use of the TRAF-Network Simulator (NETSIM) program and JRH Transportation Engineering's TransSim II (trademark) tools for agencies interested in planning and developing LRT systems. NETSIM is one of the few available traffic analysis programs with the flexibility to model the operations and mobility impacts of transit. Similarly, TransSim II (trademark) can model the impacts of transit and has been developed for this purpose. To evaluate NETSIM and TransSim II (trademark) for simulating traffic in pretimed and actuated arterial networks, outputs from the models were compared with real-world field data from Los Angeles and Long Beach, California and Portland, Oregon. The results indicated that the models could produce moderately accurate estimates of field-stopped delay and percent-stops for individual intersections within studied networks. On a systemwide basis, the models produced reasonably reliable, accurate estimates of network travel times and could reproduce most traffic characteristics observed in the field. The models performed well in simulating the control impacts and behavior of LRT in the modeled systems.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 161-166
  • Monograph Title: Traffic operations, traffic signal systems, and freeway operations 1995
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00714912
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Dec 13 1995 12:00AM