A Comparison of Contributing Factors between Young and Old Riders of Motorcycle Crash Severity on Local Roads

Abstract

This study aims to identify the factors that influence the severity of motorcycle crashes on local roads, particularly given the high speeds often observed for motorcycles on these roads with low traffic volumes and numerous multi-leg intersections. Previous research has shown that a rider’s age can impact their speed behavior. To explore this issue, data on motorcycle crashes from 2015 to 2020 in Thailand—a middle-income developing country—were analyzed using a random parameter logit model with unobserved heterogeneity in means and variances, comparing young (<30-year-old) and older (>50-year-old) riders. The contributing factors were divided into four groups: driver, crash, environmental, and road factors. The transferability test yielded different results for the young rider and old rider models, indicating that it is appropriate to analyze these models separately. A constant value revealed that old riders were more likely to die in a crash than young riders. In terms of the random parameter, the local address and road surface variables were found to be significant in both models. The results of unobserved heterogeneity in means and variances identified significant variables in both models, including gender, exceeding the speed limit, lit roads, unlit roads, mobile phone use, and road surface. These findings were used to develop policy recommendations for reducing the severity of motorcycle crashes on local roads.

Crash Severity Analysis of Young Adult Motorcyclists: A Comparison of Urban and Rural Local Roadways

“…A local address pertains to drivers who are from the same district and are highly familiar with the roads, especially in urban settings, where they are aware of stopping points and intersections. This contrasts with drivers from other areas [10]. Helmet use is a well-established factor that can decrease the risk of death, regardless of a rider's age or location [20].…”

“…As a result, the correlation with severity could be negative [6]. Driving in low visibility conditions, like in dust or fog, is often associated with driving in the rain due to a driver's hesitance to use high speeds [10]. Nighttime driving, which includes crashes with and without lights, can lead to higher severity.…”

“…Champahom et al [10] investigated the severity of motorcycle crashes by comparing younger and older motorcyclists. As displayed in Table 1, many studies have not concentrated on local roads and have seldom been conducted in developing countries.…”