Nowadays, interest in safety of pedestrians who are relatively weak when compared with vehicles increases and concern for pedestrian accidents on crosswalks also increases. For these reasons, scrambled crosswalks which are considered to contribute to pedestrian safety by reducing conflicts between vehicles and pedestrians are actively discussed and there are also a few intersections where they are actually installed.However, scrambled crosswalks must include an all-red phase for all vehicle traffic flows, which inevitably leads to increase of lost time per cycle. Therefore, evaluation in terms of efficiency should be done before installation of scrambled crosswalks. This research suggests an installation criteria for scrambled crosswalks so that it is possible to judge whether installation of scrambled crosswalks is appropriate only by surveying vehicle traffic volume and pedestrian traffic volume.This research derives optimum cycle length from signal optimization models which reflect both vehicle traffic volume and pedestrian traffic volume. From this optimum cycle length, this research compares total delay times before and after installation of scrambled crosswalks.From analysis, two research results are derived. Firstly, there is critical traffic volume above which installation of scrambled crosswalks can not be efficient. Secondly, appropriate traffic volume areas for installation of scrambled crosswalks are different by each signal intersection or by each signal system and those differences vary. From these results, this research suggests an installation criteria for scrambled crosswalks which consist of two steps.
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Installation Criteria for Scrambled Crosswalks Considering Both Vehicle and Pedestrian Traffic Volume
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