The first time I saw this sign the math stunned me. It seemed so obvious and straightforward. I was surprised to not see a designated area to pull-off the side of the road and take a picture like some sort of scenic overlook or historic landmark. There should have been a line of cars observing this unique oddity.
A site for posting photos of road signs that have mathamatical properties.
The limit of my games while on long drives was imaging a dirt bike racing along beside us, jumping over ditches and rivers, narrowly missing obstacles on the side of the road. That game only worked when you sat on the right-side of the car.