Syringa Lewis wrote: "CIte those 'many' states--- they must all be east of the Mississippi. SHEESH.....While you're armchairing what 'should' happen, you forgot the driver's piss test."

You're right. I guess I'm showing my age.  I've spent most of my time using mass transit on the East Coast for the past 4 decades, so I have not paid too much attention to trucks.  But, I do remember many states, like Wisconsin, Minnesota and Illinois where "doubles" used to be banned.  Guess the lobbyists for the trucking industry have been busy.   This accident is a good example of why "truck trains" should still be illegal.  

"Big trucks, big bucks: Heavy-spending trucking industry pushes Congress to relax safety rules"
http://www.salon.com/2015/10/31/big_trucks_big_bucks_heavy_spending_trucking_industry_pushes_congress_to_relax_safety_rules_partner/

Also, it's too bad you couldn't keep your comment respectful Syringa, but I guess that's just how some people are.