Abstract
We focus on the vehicle speed inducement effect of sequence patterns of transverse and lateral markings on a single-lane straight road. We test the effectiveness of several sequence patterns through experiments with a driving simulator. The sequence patterns are characterized by patterns of progressively and concurrently reduced spacing of transverse lines on the road surface and lateral poles on the roadside. We examine the discrepancy between vehicle speed and speed perceived by the drivers under the influence of several sequence patterns, estimating driver-perceived speed using a hidden Markov model. Experiments show that (1) perceived speed tends to be higher than actual vehicle speed, except for patterns where lines and poles were equally spaced in all intervals or where spacing was greatly decreased in the middle intervals, and (2) in the case of a pattern where spacing was greatly decreased in the first intervals, vehicle speed rapidly decreased while the perceived speed remained high.
Highlights
Traffic administrators in Japan are devising a variety of road marking patterns designed to reduce vehicle speeds for improved traffic safety
We focus on the mechanism by which patterns of sequential transverse and lateral markings induce drivers to decelerate, and test the effectiveness of various markings on a single-lane straight road through in-house experiments with a driving simulator
We define a “sequence pattern” as the alignment of progressively and concurrently reduced spacing of transverse lines on the road surface and lateral poles on the road side, “transverse and lateral markings” as road markings with a sequence patterns, and a “sequence effect” as a vehicle speed inducement effect produced by sequence patterns
Summary
Traffic administrators in Japan are devising a variety of road marking patterns designed to reduce vehicle speeds for improved traffic safety. One such pattern consists of transverse lines with progressively reduced spacing to give drivers the impression that their speed is increasing. We focus on the mechanism by which patterns of sequential transverse and lateral markings induce drivers to decelerate, and test the effectiveness of various markings on a single-lane straight road through in-house experiments with a driving simulator. We define a “sequence pattern” as the alignment of progressively and concurrently reduced spacing of transverse lines on the road surface and lateral poles on the road side, “transverse and lateral markings” as road markings with a sequence patterns, and a “sequence effect” as a vehicle speed inducement effect produced by sequence patterns
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