 curb was a barrier that must not be stepped across. I think the really nice explanation of this was when the idea of jaywalking came along, the pedestrian felt they were wrong. They felt they were wrong to be in the road. That the road no longer belonged to them, it belonged to cars. Exactly. Car firms would hire Boy Scouts to give cards to pedestrians saying, we're in a new era, this is old-fashioned what you're doing. Don't be a jay. Don't be a jay, don't cross the road like that.