EXPLOSIONS AND FIRES have taken out numerous bridges in the US in recent times. The most recent occurred in Philadelphia, only the driver was killed in this accident but this accident is not isolated. Any one wish to estimate the cost of repairs and cost of disruption to transport services. I know plenty of genius's who would surely take stab. Over 500,750 roaming around the streets of the US waiting for the chance to take some else out. Imagine been able to get this off the roads to make them vastly safer. There is a whole paper on this subject here. TANKER DISASTERS
