Field Evaluation of Roundabout Turning Movement Estimation Procedures
Publication: Journal of Transportation Engineering
Volume 133, Issue 2
Abstract
Tracking vehicles through roundabouts is laborious. Because of this, turning movement volumes are usually estimated using a variety of methods. This paper identifies and evaluates practical methods of estimating turning movement volumes at roundabouts. Thirty four experiments were used to test the effects of different estimation treatments: estimation procedure, time interval size, count location configuration, and turning movement sample procedure. A new economical sampling procedure was introduced and included in the experiment design. The experiments were evaluated using volume estimation and capacity estimation errors. Findings showed that the new sample procedure works well relative to a random sampling procedure. Other insights were gained regarding the four treatments included in the experiment design.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 133 • Issue 2 • February 2007
Pages: 138 - 146
Copyright
© 2007 ASCE.
History
Received: Aug 10, 2005
Accepted: Dec 9, 2005
Published online: Feb 1, 2007
Published in print: Feb 2007
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