PHASE ONE SIMULATION MODELING AND EXPERIENCE Sample Clauses

PHASE ONE SIMULATION MODELING AND EXPERIENCE. 7.2.1 Modeling 164th Street SW The section of 164th Street SW between 36th Avenue W and 25th Avenue W (or NorthPoint) in the City of Lynnwood was modeled to simulate the corresponding practical test sites. The simulation model was configured by using the actual layout of the corridor and traffic control parameters. Field-observed traffic volumes, transit ridership estimates, and vehicle occupancy data were used to calibrate the model. The details of model setup and calibration are described below. To model the Phase One test corridor, we obtained arterial geometric characteristics and transit stop coordinates from construction designs and the GPS systems used by Snohomish County, in addition to practical observations (Snohomish County 2003). Traffic control and operational parameters at the test corridor were collected from the Snohomish County Department of Transportation. In accordance with the practical test situation, the TSP function was enabled in the control strategies for the four intersections—164th Street and 36th Avenue, 164th Street and Park-and-Ride, 164th Street and Alderwood Mall Parkway, and 164th Street and NorthPoint—along the Phase One test corridor. The emulated NEMA controller in VISSIM can be properly configured as a standard NEMA controller to satisfy the requirements of fully actuated signal control and basic TSP operations. Thus, in this study we applied the emulated NEMA controllers in the simulation model to implement the real signal control plans in operation for each intersection. The basic TSP routine was supported by the NEMA controller. A transit call detected by sensors could generate a request for early green or extended green operation that would be consistent with the logic in the SS-RTSP system.