Abstract
Speed has an important impact on driving safety, however, this factor is not included in existing safety warning algorithms. This study uses lane change systems to study the influence of vehicle speed on safety warning algorithms, aiming to determine lane change warning rules for different speeds (DS-LCW). Thirty-five drivers are recruited to carry out an extreme trial and naturalistic driving experiment. The vehicle speed, relative speed, relative distance, and minimum safety deceleration (MSD) related to lane change characteristics are then analyzed and calculated as warning rule characterization parameters. Lane change warning rules for a rear vehicle in the target lane under four-speed levels of 60 ≤ v < 70 km/h, 70 ≤ v < 80 km/h, 80 ≤ v < 90 km/h, and v ≥ 90 km/h are established. The accuracy of lane change warning rules not considering speed level (NDS-LCW) and ISO 17387 are found to be 87.5% and 79.8%, respectively. Comparatively, the accuracy rate of DS-LCW under four-speed levels is 94.6%, 93.8%, 90.0%, and 92.6%, respectively, which is significantly superior. The algorithm proposed in this paper provides warning in the lane change process with a smaller relative distance, and the accuracy rate of DS-LCW is significantly superior to NDS-LCW and ISO 17387.
Highlights
Speed is an important parameter affecting driving safety, with the collision rate and the severity of all road types rising with an increase of speed [1,2]
China has formulated national paper is compared with NDS-Lane change warning systems (LCW) and ISO 17387, to verify its feasibility
The average value of the warning accuracy rate for DS-LCW was 5.3% higher than that of NDS-LCW and 13% higher than that of ISO 17387
Summary
Speed is an important parameter affecting driving safety, with the collision rate and the severity of all road types rising with an increase of speed [1,2]. In the process of driving, speed has an impact on the driver’s psychology and horizon [3,4]. Speed has a significant impact on all types of collision warning systems. Kim found that 70% of urban road collision accidents occur when the speed is slower than 30 km/h, and developed a low-speed short-distance collision warning system [6]. In the process of the lane change, the driver’s subjective safety lane change conditions vary at different speeds. The driver requires a longer relative distance and time to collision (TTC) with other vehicles to meet the needs of safe lane change at high speed
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