With school in session, there will be significantly more traffic in and around school areas. Pedestrians, bicyclists, buses and cars all contribute to school zone congestion. In addition, children do not always follow the rules of the road. Often they enter the street from between two cars, attempt to "run" red lights with their bikes through intersections, and skateboard or walk into traffic without checking. Some parents cross the street wherever they park, instead of walking to the corner.