Will DJI drones follow and take pictures of moving cars?

Yes.

You can select the target by clicking on the camera live image in the DJI GO App. After the target is selected, the aircraft will use the camera to track the target. The aircraft will maintain a certain distance from the target and follow it. During the entire following process, the following function can be completed without the help of an external GPS device.

Currently, only the entire P4 series (except RTK), Mavic Pro, Spark, Mavic Air and Mavic 2 Zoom/Pro support the smart follow function.