I drive past this sign at the entrance of my apartment complex twice a day and each time I wonder, why 13 mph? If you hit a pedestrian, does 13 mph hurt any more or less than 12 or 14 mph? If you hit a car, does 13 mph do any more or less damage than 10 or 15 mph?
13 mph just seems a rather peculiar number to choose. Does anyone know why it’s 13 mph? To get your attention, maybe?