As I mentioned in another comment, Waze does this. There's a stretch of the Capital Beltway that, if it was on a race track and compressed, would be called "esses." It's totally fine to navigate at 80 MPH with no drama in any mechanically sound, post-1980 car, but it catches mediocre drivers by surprise. Waze throws up a "history of accidents" message whenever I drive through it.