The action undertaken may be communicating to at least one of the vehicles potentially involved in the collision an indication of the collision prediction to enable the driver of the vehicle to initiate an action to prevent the collision, or automatically implementing {HEAD ~ a change} in {TAIL ~ the movement} of one vehicle 
in
The action undertaken may be communicating to at least one of the vehicles potentially involved in the collision an indication of the collision prediction to enable the driver of the vehicle to initiate an action to prevent the collision , or automatically implementing { HEAD ~ a change } in { TAIL ~ the movement } of one vehicle
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH