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Citation |
Kacir KC, Benz RJ, Hawkins HGJ. Transp. Res. Rec. 1993; 1421: 21. |
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Copyright |
(Copyright © 1993, 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 |
Flashing traffic signal operation can offer reduced delay over alternative modes of signal operation, such as pretimed and actuated. The research described in this paper was conducted as part of a study on flashing traffic signals. Significant research activities included a review of previous literature, a survey of current practice, an operational analysis of alternative modes of signal operation, and the analysis of traffic volumes during late-night low-volume periods. The literature review found few comprehensive guidelines, although there is evidence that substantial interest exists. The survey of current practice indicated that traffic engineers primarily rely on engineering judgment instead of standards or guidelines. The operational analysis determined that for low volumes, the flashing yellow/red operation will reduce total delay by 50% versus pretimed and actuated operation. In general, the red/red flash operation will produce the most amount of delay. Data collection efforts revealed that typically 2.5% of the average daily traffic (ADT) occurs during the period between midnight and 6:00 a.m. and that the hourly volume during this period ranges from 0.2 to 0.8% of the ADT. Language: en |