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[quote user="Uber"]Imagine a 45' low profile car designed to crumple and dissipate impact energy.[/quote] Crash energy management yes but low profile cars won't work. The tend to climb much easier than high cars. The accident at Red Oak comes to mind <a href="http://bustrainandtrolley.wrongfuldeathconsultants.com/wp-content/uploads/ntsbreport.jpg">http://bustrainandtrolley.wrongfuldeathconsultants.com/wp-content/uploads/ntsbreport.jpg</a> The new high-speed locomotive Siemens ACS64 is equipped with Crash Energy Management (CEM) elements for head-on collisions up to 25 mph. 50 mph is a four times higher crash energy. Theoretically it should be possible to design CEM elements for 50 mph. If it is practicable I doubt. There always will be crash scenarios that cannot be handled even with the best of crashworthiness designs. I think existing locomotives can't get retrofitted as the load carrying structure doesn't fit. Regards, Volker
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