think they had the idea for londons oxford street, but never took off. It is just quicker to walk on the roads. I know in a perfect world people would just go about at a steady pace, but when your on a short lunch break and there are yummy mummys and tourits going at a normal snail pace, it is annoying when you just wanna grab a bite to eat. Not sure if the idea will work, how you enforce it etc. christ, they cant even enforce seatbelt laws and thats there to save lives.