Abstract
For the purpose of enhancing road markings to prevent speeding on curved road, we focused on a deceleration effect of array patterns of transverse and lateral marking on a straight section of roadway leading into a transition section of the curved road. We tested the effectiveness of several array patterns through two in-house experiments, i.e. a driving-simulation experiment with driving simulator and a speed-perception experiment with recorded moving pictures. We estimated trends in spot speed that was perceived by a driver (test subject) who went into the curve entrance under the influence of the array patterns, by using hidden Markov model on the estimation, so that we examined a discrepancy between the perceived speed transition and the vehicle speed transition. The experimental results concluded that, (1) there existed the array patterns providing driver's underperception to vehicle speed according to changes in road curvature, and (2) such risk showed that the array-pattern type which had greater decrease rates in the end or beginning section than in remaining sections was encouraged to be laid on the curved road.
