Development of Professional Driver Adjustment Factors for the Capacity Analysis of Signalized Intersections
Publication: Journal of Transportation Engineering
Volume 134, Issue 12
Abstract
Various factors are provided in the Highway Capacity Manual to adjust the base saturation flow rate for the capacity analysis of signalized intersections under the prevailing conditions. There are, however, no factors to account for the possible change of capacity at signalized intersections caused by professional taxi drivers in the traffic stream. The results obtained from a study to develop professional driver adjustment factors for capacity analysis of signalized intersections are summarized. The factors were derived on the basis of the data collected in Yokohama City, Japan. The results indicated that taxi drivers had a significant impact on the saturation flow rate. When a signalized intersection was identified with a high volume of taxi drivers, the saturation flow rate as well as the capacity could be increased by 20%, which corresponded to a professional driver adjustment factor as high as 1.20.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 134 • Issue 12 • December 2008
Pages: 532 - 536
Copyright
© 2008 ASCE.
History
Received: Apr 2, 2007
Accepted: Jun 20, 2008
Published online: Dec 1, 2008
Published in print: Dec 2008
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