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this is my defence, i saw a sign saying caution road closed ahead, incident slow. further down the road there was another sighn, however a van was parked infront of it so i could not see it, the cars infront drove around it so i slowly and carefully followed, i then saw a police car ahead parked across the road so to began to turn around in a safe place a good distance from the accident, i saw atleast 10 cars do this whist i was stood there, some got away. traffic was also alound coming from the other way.