Imagine a straight road in any town, one lane in each direction plus center lane for turns. It's 2AM, no traffic but wintry conditions (road plowed but slushy, possibly icy spots but no snowfall), you're going 40mph (speed limit is 30, though
) and you're keeping a proper following distance. The car in front of you slows down and signals to make a right turn. What would you do, slow down and wait until he finishes his turn or just merge to the center lane, keep your speed and pass?
