Japanese Journal of JSCE
Online ISSN : 2436-6021
Special issue (Infrastructure Planning and Management) Paper
INFLUENCE OF TAILGATING ON DRIVING BHAVIOR AND COLLISION RISK USING CONTINUOUS VEHICLE TRAJECTORY DATA
Toru NOGUCHINobuhiro UNORyoji MATSUNAKAKousuke TANAKATomoki NISHIGAKI
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2024 Volume 80 Issue 20 Article ID: 24-20109

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Abstract

This study defined the state of not maintaining a safe following distance as “tailgating” and analyzed its impact on car-following behavior of the preceding vehicle and collision risk using continuous vehicle trajectory data. This study extended the linear following model, known as Helly model, by adding explanatory variables that account for the risk of rear-end collision. A multiple linear regression analysis was applied to estimate the model parameters. Two key insights emerged from our analysis. Firstly, for tailgated vehicles, jerk (rate of change of acceleration) is significantly positive. This suggests that when tailgating occurs, the following vehicle experiences pronounced acceleration and deceleration. Additionally, when tailgating is present, the collision risk with the preceding vehicle is relatively low, but the risk with the following vehicle is relatively high. Secondly, From the estimation results of the Helly model, it was observed that in cases where tailgating is occurring but there is still ample following distance with the leading vehicle, there is a tendency for acceleration when the cumulative back-PICUD value becomes large.

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© Japan Society of Civil Engineers
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