Models of Motorcycle Deceleration Behavior at Signalized Intersections

Abstract

paired riding of motorcycle is defined when a couple of motorcycles travels abreast together as a pair over 10 (m).

Motorcycle crash risk models for urban roads

“…Also, because they occupy a small space, motorcycles are able to travel alongside other vehicles in the same car lane and to filter through the lateral clearance between vehicles. These movement characteristics of motorcycles are distinct from the conventional driving behaviour of passenger cars and are described as non-lane-based movement (Lee, 2007;Long, 2012;Minh, 2007;Shiomi et al, 2013).…”

“…Under the assumption that the front distances follow a lognormal distribution (Lee, 2007;Minh, 2007), the probability that the subject motorcycle potentially collides with the preceding vehicle is given by 10:…”

“…Data extraction The trajectories of vehicles were manually extracted from the recorded video file using SEV (speed estimation from video data) computer software (Minh, 2007), which converts video screen coordinates into roadway coordinates. As a result, a dataset containing 541 observations of the trajectories of 108 subject motorcycles and 1047 observations of 212 influential vehicles was used to estimate the unknown coefficients of the proposed models.…”

“…In a motorcycle-dominated traffic situation, motorcycles present non-lane-based movement characteristics, which have been found to be the major causes contributing to the crash risk for motorcyclists (Indriastuti and Sulistio, 2010;Long, 2012;Minh, 2007;Shiomi et al, 2013). In Vietnam, for example, crash data reveal that 'changing lanes improperly', 'failing to keep safe following gap' and 'failing to look properly' are the major causes of crashes involving motorcycles, accounting for 19·3%, 16% and 15·9% of crashes, respectively (DoT, 2013).…”

“…To investigate the effect of speed and lateral gap on the occurrence of a sideswipe collision, the probabilities were estimated for different speed levels of the adjacent following motorcycle for five scenarios with a lateral gap of 0·5 m, 1·0 m, 1·5 m, 2·0 m and 2·5 m. To simplify the calculation process, several parameters were assumed to be constant: the reaction time (τ) of motorcyclists was assumed to be 0·5 s (Minh, 2007), the braking deceleration of a motorcycle in an emergency situation was assumed to be 6·02 m/s (Seyed and Hussain, 2013) and the swerving angle was assumed to be 10°(the mean calculated from the collected dataset). As shown in Figure 6, the probability of a sideswipe collision increases with the value of speed but decreases with an increase in lateral gap.…”