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Title: Safety Impacts of Left-Turn Phasing Sequence
Accession Number: 01123030
Record Type: Component
Availability: Transportation Research Board Business Office 500 Fifth Street, NW Abstract: The safety impacts of left-turn phasing sequence have long been a discussion topic for traffic engineers. This research investigated the safety impacts of different types of left-turn signal phasing sequence under different types of left-turn signal control modes. It was found that, under protected-only (PO) control mode, lead-lag is the safest sequence, followed by the lead-lead and lag-lag sequences; under protected/permissive left-turn (PPLT) control mode, the lead-lead sequence is safer than the lead-lag sequence. In addition, the safety impacts of consistency of signal phasing were assessed by comparing the accident rates at four different corridor sections with different levels of mixed signal phasing sequences. It was found that the application of mixed signal phasing sequences increased the risk of accidents at intersections.
Monograph Title: Monograph Accession #: 01120148
Report/Paper Numbers: 09-3177
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Qi, YiGuo, LeiYu, LeiPagination: 19p
Publication Date: 2009
Conference:
Transportation Research Board 88th Annual Meeting
Location:
Washington DC, United States Media Type: DVD
Features: Figures; Maps; References
(13)
; Tables
(8)
TRT Terms: Uncontrolled Terms: Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors; I72: Traffic and Transport Planning; I82: Accidents and Transport Infrastructure
Source Data: Transportation Research Board Annual Meeting 2009 Paper #09-3177
Files: TRIS, TRB
Created Date: Jan 30 2009 7:35PM
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