Originally Posted by topflightpro

Even if they clean it up, there is still a good chance those spots will be slick when it rains.

We frequently hold races on a banked oval car-race circuit - it's basically for amateur NASCAR racers. There is such a collection of oils and other motor vehicle chemicals on the asphalt that we cannot race there in the rain. It is like being on a slip n' slide.

And this is several years old now, but it's not uncommon for people to do things to terrorize bicyclists: Trail of terror for cyclists may lead to prison | Lubbock Online | Lubbock Avalanche-Journal