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Title: Spatial and Temporal Analysis of Driver Gap Acceptance Behavior at Modern Roundabouts
Accession Number: 01474064
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: Despite an increasing acceptance of modern roundabouts in the United States, unfamiliarity with this type of intersection is still widespread. This unfamiliarity results in drivers making unpredictable decisions about gap acceptance, thus increasing the difficulty of design decisions. The relationship between the spatial and temporal critical gaps accepted by drivers in modern roundabouts is explored with gap acceptance data from more than 1,500 vehicle interactions at the roundabout on the University of Massachusetts, Amherst, campus. The critical gap was determined to be 42 ft spatially and 2.2 s temporally, which correlated directly with the average speed of the circulating flow. A longer critical gap time was observed for heavy vehicles in the traffic stream. Even though the unidirectional flow of the circulating traffic creates a potentially unpredictable environment for the driver, careful and precise analysis to obtain an accurate and reliable value of the critical gap will allow for improved roundabout design.
Monograph Title: Monograph Accession #: 01514641
Report/Paper Numbers: 13-3237
Language: English
Authors: Fitzpatrick, Cole DAbrams, Daniel STang, YueKnodler Jr, Michael APagination: pp 14–20
Publication Date: 2013
ISBN: 9780309287135
Media Type: Print
Features: Figures
(7)
; Photos; References
(23)
; Tables
(2)
TRT Terms: Uncontrolled Terms: Subject Areas: Design; Highways; Safety and Human Factors; I22: Design of Pavements, Railways and Guideways
Files: PRP, TRIS, TRB, ATRI
Created Date: Feb 5 2013 12:39PM
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