Rocker Sammy Hagar famously protested the speed limits of the ’70s and ’80s with his “I Can’t Drive 55.” Eventually, of course, those restrictions largely gave way, and we’ve enjoyed 70 and above on much of the Interstate system since.The double-nickel feels like a crawl to anyone who’s not Amish, but with $4-plus diesel and soon gasoline, how would you feel about 65 mph (and would we call that “
