Some thirty years ago I became involved in an almost identical incident in U.K. Returning to RAF Odiham my crewman spotted a car flip over in the fast lane of the M3, adjacent to the exit just near us. It began smoking. I landed our Puma on the traffic island by the exit and the crewman ran down to the car, taking rescue gear. It turned out that the car was being pursued by the police, who arrived shortly afterwards. They were able to deal with the situation so the crewman returned to the aircraft and we lifted off and carried on back to Odiham. Good job all round, we thought.
Shortly after landing I received a telephone call from the RAF Police demanding to know why I had landed to pick up a hitch hiker from the M3! Good old RAF police...