Vehicle lane change early warning method under different traffic environments

Abstract

The invention discloses a vehicle lane change early warning method in different traffic environments, which comprises the following steps of firstly, respectively carrying out natural driving test andlimit test on a vehicle in different traffic environments, and obtaining natural driving test lane change data and limit test lane change data of the vehicle in different traffic environments, according to the limit test lane change data, when the relative speed of the two vehicles is greater than 0, taking the brake deceleration of the rear vehicle in the target lane as an early warning index, determining early warning thresholds under different traffic environments, according to the natural driving test lane change data, when the relative speed is smaller than 0, using the relative distanceas an early warning index, determining early warning thresholds under different traffic environments, and finally, for vehicles running in different traffic environments, selecting corresponding early warning thresholds according to the positive and negative relative speeds, and conducting lane change early warning on drivers of the vehicles. The false alarm rate of the early warning system is effectively reduced, the acceptance degree of a driver to the lane change early warning system is improved, and the early warning effect of the early warning system is improved.

Description

technical field [0001] The invention relates to the technical field of automobile active early warning, in particular to a vehicle lane change early warning method under different traffic environments. Background technique [0002] During the driving process, the lane changing behavior involves the interaction with the surrounding vehicles, and the risk factor is high. Using the lane changing warning system to issue early warning to the driver can effectively reduce the occurrence of lane changing collision accidents. However, the existing lane-changing warning rules and systems do not consider the impact of the traffic environment on the warning threshold. Under different traffic environments, the speed of the vehicle is different, and the risk of the driver changing lanes is also different. The ISO 17387 lane-changing warning rule is widely used. The setting only considers the relative speed, and lacks the discussion of the traffic environment. Under the same relative spee...

AI Technical Summary

Problems solved by technology

However, the existing lane-changing warning rules and systems do not consider the impact of the traffic environment on the warning threshold. Under different traffic environments, the speed of the vehicle is different, and the risk of the driver changing lanes is also different. The ISO 17387 lane-changing warning rule is widely used. The setting only considers the relative speed, and lacks the discussion of the traffic environment. Under the same relative speed, taking TTC 3s as an example, the driver's risk perception will be very different when the vehicle is driving on the expressway and ordinary urban roads. The driving speed of highway vehicles is high, and drivers tend to be more cautious as a whole, while the driving speed of urban roads is relatively low. The results of lane-changing decisions in the two traffic environments will be completely different

If the impact of the traffic environment on the early warning threshold is not considered, it is easy to cause premature early warning on ordinary urban roads caused by a fixed early warning threshold, and untimely early warning in the expressway environment, which will increase the probability of system false alarms and missed alarms, and reduce the number of drivers. Acceptance of lane change warning system

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