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Citation |
Perfater MA. Transp. Res. Rec. 1983; 926: 7-12. |
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Copyright |
(Copyright © 1983, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing) |
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DOI |
unavailable |
PMID |
unavailable |
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Abstract |
The findings of a study of motorists' perceptions of exclusive/permissive (E/P) signal phasing at 10 intersections in Virginia are presented. Traffic volumes and conflict rates were counted at each site and accident files were investigated. In addition, 1,252 residences and small businesses in the vicinity of the sites were sent questionnaires to determine motorists' opinions and perceptions of E/P phasing. A total of 460 completed questionnaires were received and analyzed. Roughly one-third of those queried were confused by the E/P signal the first time they encountered it, but the confusion dissipated over time. Advance publicity of an E/P signal modification or installation and an explanatory sign placed adjacent to the signal head will do much to reduce motorists' confusion. More than 70 percent of those surveyed wee in favor of E/P signal phasing and 77 percent thought that it reduced intersection delay. Onsite observations revealed that vehicular conflicts at E/P intersections are most frequent at locations that have high volumes of turning vehicles and various movements of traffic. The conflict rate could not be attributed to any one characteristic of an intersection, however. The same was true for the accident rate. (Author) Language: en |
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Keywords |
MOTOR TRANSPORTATION; ROADS AND STREETS - Intersections; SIGNALING - Accident Prevention |