The east-west traffic heads directly at the circle so drivers have to swerve gently to the north or south to miss the circle. Some don't bother, or they don't see the curb, which is barely two inches tall in places because there are so many layers of gravel, tar, and asphalt that have the lifted the roadbed. This year, just as an orange-flowered canna added a third stalk, somebody ran over the curb and did this. I'm thankful for nothing worse. Last year one car drove across the center of the circle, barely missing the boulder but flattening plants all the way. The year before someone jumped the curb, stopped in the middle of the circle, then backed out, doubling the damage. I think the drivers who pass the circle often have begun to stay clear. But there's always the guy whose night vision is blurred by four beers.