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建议速度是用来提醒司机通过弯道或其他特殊道路条件时最大的推荐速度,可以引导司机在危险点处选择安全车速。目前在城市快速路匝道以及小半径弯道的入口限速标志通常采用单一的限速值,由于限速值过低,实际的运行速度远远高于限速值,导致安全事故的频发。利用高精度车载GPS对小客车在不同弯道半径下的运行速度进行采集,建立距离与运行速度的预测模型;以实际运行速度的85%作为建议速度值,并给出建议速度标志的设置间距。通过驾驶模拟舱设置相应场景进行仿真,仿真结果显示,当弯道上连续设置建议速度标志时,可以有效降低车辆的实际运行速度。
The suggested speed is the maximum recommended speed to alert drivers when passing corners or other special road conditions and to guide the driver to choose a safe speed at the point of danger. At present, a single speed limit value is usually adopted for the speed limit signs at the urban expressway ramp and the small radius bend. Since the speed limit value is too low, the actual operation speed is far higher than the speed limit value, leading to frequent accidents. The use of high-precision car GPS on the passenger car in different corners of the radius of the speed of collection, the establishment of the distance and speed of the prediction model; 85% of the actual operating speed as the recommended speed, and gives the recommended speed flag set spacing . Simulation is made by setting the corresponding scene in the simulation cabin. The simulation results show that when the recommended speed flag is continuously set on the curve, the actual running speed of the vehicle can be effectively reduced.