I say the cop,s fault because he could quite easily have parked off the road and walked to the edge of the road. The yellow car was blind behind the lorry, how could he have had time to react once the lorry pulled over ? You don,t expect to find someone standing in the middle of the road when travelling at speed when a lorry pulls over to let you overtake. So, as far as I,m concerned, it,s mostly the cop's fault - and don,t forget, there was a car in front of the yellow car up until the last minute so the yellow car was blind until seconds before impact.