The present invention relates to a method and a system for monitoring an area below an autonomously driving vehicle. The method includes the steps of using a sensor to capture a first shape of the ground below the autonomous driving vehicle when the autonomous driving vehicle is stopped, and before the autonomous driving vehicle is switched off. Storing the shape in a memory, capturing the second shape of the ground surface below the autonomous driving vehicle using the sensor before the autonomous driving vehicle starts moving, and using the electronic processor to perform the first processing. Comparing the shape with the second shape. The method includes the step of enabling autonomous driving of the autonomous driving vehicle when the first shape of the ground surface below the autonomous driving vehicle matches the second shape of the ground surface below the autonomous driving vehicle.
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