Method and system for detecting lane departure of automobile on key road section and storage medium

The invention discloses a key road section vehicle lane departure detection method and system and a storage medium. The method comprises the steps of obtaining basic angle information according to an echo signal of a key road section vehicle; calculating an echo signal deflection angle of the automobile according to the basic angle information; judging whether the automobile deviates from the lane according to the echo signal deflection angle; if the automobile deviates from the lane, generating an alarm signal; and if the automobile deviating from the lane returns to the lane again, generating an alarm release signal. The system can judge the lane departure condition of an automobile running on a key road section in real time, and can give an early warning in time after finding the automobile departure from the lane to remind an automobile driver to return to the right track again, so that traffic accidents caused by the fact that the automobile departure from the track are avoided. 本发明公开了一种重点路段汽车偏离车道检测方法、系统