Glad you used the word "solve" instead of "prevent", since "gold standard engineering" still does not prevent crashes.
Exhibit A: a modern motorway with all the barriers and signage... still has massive skidmarks and impact evidence at random places. Caused by: poor driving.
Speed is an irrelevant aspect. Look at our current Indy car champion who drives quite rapidly. The road has all of the lovely safety gear, yet an accident only happens when a driver screws up.
Quite frankly Mr Darwin could be of use thinning out the more stupid drivers on our roads.
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