The problem appears to be Network Rails own fault: an inadequate bridge parapet. Given the weight of traffic using the bridge it should have been constructed to withstand a maximum credible accident. Which, on a road used by 40 to HGVs is more than a mere collision by la lightweight vehicle.
So he's come off the road, through the barriers, through trees, damaged one not unsubstantial concrete and steel wall, probably whist airborne, and gone through a second, and you think it's Network Rail's fault?!
I dread to think what speed he was doing along the M602 but I bet someone's looking at camera footage now. He's just gone straight on at the junction, video game 'skills'.
He's rather lucky there was a possession on and the overheads were isolated at the time too.