This simple mod turns on the beacon lights of any vehicles that have them if the you are inside of it, an AI worker is using it, or you leave the vehicle while it’s running. This can be an alternative way of knowing which vehicles are in use or still running/burning fuel from a distance. I also always had a pet peeve of the AI not using the beacon lights so I decided to fix it myself. You can configure the LUA file at the top to adjust the settings to your liking. The default is full control, which turns beacon lights on automatically for you and the AI.
— Customize the behavior of beacon lights by setting BeaconControl to 1, 2, or 3:
— 1: Automatic beacons for player actions only (entering, driving, exiting with engine on). AI behavior unchanged.
— 2: Automatic beacons for AI workers only (on when AI controls vehicle, off when AI stops or engine off). Player behavior unchanged.
— 3: (Default) Full control – beacons on for both player and AI when vehicle is occupied or engine is running.

Credits:
Merq