Investigation of a DSRC-based end of queue collision warning system by considering real freeway data

Investigation of a DSRC-based end of queue collision warning system by considering real freeway data

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As a rapidly developing technology, dedicated short-range communications (DSRC) can facilitate the solution to increasingly outstanding traffic safety problems, especially for collision warning. The conventional collision warning system using DSRC is based on the kinematic model, which depends on accurate velocity and position information. However, the reliability of the system may be reduced due to low DSRC penetration rate, communication range constraint, and vehicle positioning error. In this study, a DSRC-based end of queue collision warning system is proposed without concerning position information. The warning criterion is defined according to the real traffic data rather than experimental data. According to the warning strategy, warning evaluation proves that the strategy is effective under low DSRC penetration rate condition. Despite the DSRC penetration rate, traffic and communication influential factors are also taken into consideration in the evaluation model. The warning performance under different weather conditions is analysed based on the simulation result. Comparison studies demonstrate that the proposed algorithm outperforms the variable speed limits warning strategy based on the loop detector.


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