Well I think it is in reality....
If he had parked up where he should not have done, like in a lane of the motorway......( half a km from a lay bye.
Reflectors, parking lights, best still hazard warning lights all could have prevented the accident..... able to be seen from some distance. Headlights only illuminate so far........
I see the back of trucks often, sometimes no working lights, filth covered reflectors, and nothing to stop a vehicle going under the much higher truck.. Many a truck is parked up where it is dangerous.