ANSWER
That was the day they switched from driving on the left side of the road to the right side of the road. No one was allowed to drive anywhere in the entire country for five hours, much longer in the cities, so that the road signs could be moved around. (And also to keep people from running into each other during the transition.)
WHO GOT IT RIGHT: George Waller, Lee Lewis, Luke Schumacher, and Steve Shuba.