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-£1 Camino Real Traffic lJ£gnal System City of Redwood City 5.3 SimuJation/Calibration Runs MMA staff have significant experience in the usage of a variety of signal timing and simulation software such as TRANSYT -7F, PASSER II, PASSER IV, and NETSIM. In addition, MMA uses SYNCHRO and Arterial Analysis Package (AAP) Software which provide the flexibility to use both TRANSYT -7F and PASSER. II for a given network without significant additional effort. The simulation runs will involve network coding, input of all relevant existing conditions information such as existing signal timing parameters, geometries, capacity and speed parameters. Measures of Effectiveness (MOE's) will be determined for each run and summarized. The MOE's will be summarized and reviewed with City staff. Based on the review of MOE's, and comparisons to field conditions data (extensively observed) such as queues, traffic flows, and arrival/departure patterns, appropriate calibration will be performed to finalize simulation. 5.4 Develop Optimized Signal Timing The traffic signal timing optimization process will be based on the guidelines to be provided by the City staff and other respective jurisdictions. The guidelines may be related to elements such as minimum cycle lengths, yellow intervals, all-red intervals, and posted speed versus results from speed survey. The analysis will include evaluation of appropriate cycle length for each subsystem for various time-of-day plans, potential intersection phasing and sequencing modifications, and potential geometric modifications. Results would provide timing plam for proposed signal timing and the intersection delay results based on the proposed signal timing. The primary objectives of the optimization are to reduce automobile emissions, stops, vehicle delay, fuel consumption, improve traffic flows and quality. In addition, signal coordination along the systems will be improved. In order to optimize both progression of traffic and associated MOE's, potential application of TRANSYT-7F in conjunction with PASSER-II (baOO width constrained scenario) may be utilized. This could be easily accomplished with SYNCHRO Software. The start and end times for implementation of optimized signal timings for each peak period and each system will be identified. MaE's will be generated for the optimized signal timings for all three peak periods. 5.5 "Before" Study The "before" study for this project will be based on a field study. A "before" sIDdy for measuring travel time and delay in the sIDdy area will be conducted. Before and after sIDdies are conducted to assess the current traffic operations as well as benefits from traffic operation improvements such as signal timing. The procedures for conducting the travel time and delay surveys is described in detail in the Manual of Traffic Engineering Studies published by the InstiIDte of Transportation Engineers. In summary, the manual describes two distinct procedures for collecting the required data: "the license plate technique" and the "study car technique". The liceme plate technique usually involves a two-person team of observer and recorder for each direction of travel at both the start and the end of the study route. The test car method of collecting information provides flexibility in evaluating the quality of traffic flow. A test vehicle is driven along the study route in accordance with one of the following operating conditions: (1) Floating-car technique, (2) Average- car technique, and (3) Maximum-car technique. The Maximum-car technique in which a vehicle is driven at the posted speed limit or the platoon speed, unless impeded by actual traffic conditions is the preferred method for measuring traffic performance. The information collected will include location, duration, and cause of traffic delays along the sIDdy route. In addition the survey, will collect data related to the number of stops, duration of each stop, reason for stopping, and total travel time. The information is converted to measurement of delay, average speed and average travel times. Meyer, Mohaddes Associates, Inc. 33 '.r"~