详情

原文传递 EVALUATION OF SPEED MEASUREMENT AND PREDICTION TECHNIQUES FOR SIGNALIZED ARTERIALS.

题名：	EVALUATION OF SPEED MEASUREMENT AND PREDICTION TECHNIQUES FOR SIGNALIZED ARTERIALS.
作者：	Dowling-RG; Cheng-WWK
关键词：	TRAFFIC-SPEED; SPEED-MEASUREMENT; SPEED-PREDICTION; ARTERIAL-STREETS-URBAN; LOS-ANGELES-CALIFORNIA; FLOATING-CARS; LOOP-DETECTORS; AERIAL-PHOTOGRAPHS; HIGHWAY-CAPACITY-MANUAL; COMPUTER-SIMULATION-MODELS
摘要：	The ability to accurately measure and predict the average speed of traffic for different facilities and conditions has become increasingly important with the implementation of the Environmental Protection Agency's Transportation Conformity Rule. Average speed is a vital input into motor vehicle emission rate models. Three speed measurement techniques (floating cars, loop detectors, and aerial photographs) and two average travel speed prediction techniques (the "Highway Capacity Manual" method for arterials and TRANSYT-7F for signalized arterials) are evaluated. These techniques are compared and evaluated against 4 hr of field data gathered for an 8-mi (13-km) section of Ventura Boulevard in Los Angeles, California. The mean speeds measured by floating cars and aerial photographs were in close agreement (within 6% of each other). Loop detectors generally produced mean speeds 22% higher than the floating car measurements, even after correcting for the differences between the space mean speeds measured by floating cars and the time mean speeds measured by the loops. TRANSYT-7F was able to predict the average travel speeds on the arterial within 3% of the floating car measurements and 5% of the aerial photograph measurements. The "Highway Capacity Manual" estimates were uniformly 18% lower than the measured floating car speeds. A correction to the method improved the estimates but tended to slightly overcompensate. The adjusted estimated speeds were 9% higher than the floating car speeds.
总页数：	Transportation Research Record. 1996. (1564) pp20-29 (6 Fig., 4 Tab., 10 Ref.)
报告类型：	科技报告