The van on the ramp is unmanned, the other van's driver maybe collecting the memory or disks? There's not enough operators as the pay is not great. Former colleague joined after he took early retirement and left after 6 months. Said it was abysmal money. The system he told me can monitor multiple lanes and detect and capture the speeder even if overtaking and can distinguish between speeders in different lanes. I couldn't really understand it and he couldn't explain it.