Complex sentence: These use LIDAR, radar and cameras to detect if the crossing is blocked by any vehicle (and cameras to record number plates), as well as lasers and reflectors to scan the crossing and see if the path of the laser is blocked.
Split into simpler sentences: These use LIDAR, radar and cameras to detect if the crossing is blocked by any vehicle, and cameras to record number plates. They also include lasers and reflectors to scan the crossing and see if it is blocked.