Following too closely. It doesn't matter how skilled riders are if they do not have the time and distance required to see a hazard, they will hit the object the car in front of them drives over. The ideal following distance is between two to three seconds in order to maintain a gap between you and the car in front of you. Don't forget all of the hazards that are out there on the roadway: potholes, manhole covers, rocks, sand, oil, anti-freeze, ladders, and couch cushions—you name it, we have seen it on the road. So, if you allow for the proper following distance, these hazards can easily be avoided.