> It seems more clear to me, but how do I know for sure? Oh! I'll put them up on a road and see if the accident rates change!". Meh. The American way would be

> It seems more clear to me, but how do I know for sure? Oh! I'll put them up on a road and see if the accident rates change!". Meh. The American way would be "Build a street for font, and see which one people are willing to pay more for"