Power Ranger , Ark Royal's point that the lack of safety barriers contributed to this disaster is valid. As it happens, Gary Hart has been found guilty because he drove when he knew he was mentally wrecked. Now let's say that the circumstances were different and that a tyre had, in fact, blown. With an innocent driver who do you then blame, and with ten dead someone must carry the can. Any design of overhead motorway which allows an out of control vehicle to land on a high speed railway track is seriously deficient. A few thousand pounds worth of crash barrier would have prevented this - knackered driver or tyre blow out - full stop.