Transportation Analysis Simulation System (TRANSIMS): The Dallas Case Study
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1998-01-01
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Abstract:This report summarizes the procedure, results, and conclusions of a case study application of the TRansportation ANalysis SIMulation System (TRANSIMS) microsimulation procedure in Dallas, Texas. The purpose of this case study was to test the capabilities of the TRANSIMS microsimulation to track the movement of simulated individual vehicles through a simulated representation of a transportation network. The case study successfully demonstrated those capabilities using real travel data to address actual planning issues. The case study examined how two different kinds of roadway improvements would relieve traffic congestion in an intensely developed suburban area in north Dallas. The area is served by north-south and east-west freeways that intersect near office buildings, hotels, and the largest shopping mall in Dallas. The roadway network changes considered were adding a lane in each direction to one of the freeways and modifying arterial street operations, intersections, and capacity. Results indicated that both improvement options reduced the median travel times from those in the base existing condition for all travelers. Reductions in travel times were about equal for the two improvement options, but the effects of the arterial improvements were observed about half an hour earlier than the effects of the freeway improvements. Both improvement options reduced travel times for trips that did not stop at the shopping mall, and those reductions were nearly equal.
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