Parking signs are important tools used to regulate where and when vehicles can park. They provide clear instructions to drivers, indicating whether parking is allowed, restricted, or prohibited in certain areas. Common types of parking signs include no parking, permit required, and 2-hour parking limit. These signs often include symbols and colors to convey their messages quickly. For example, a red circle with a line through it typically means no parking, while a green sign may indicate that parking is allowed. Understanding these signs helps maintain order on the roads and ensures safety for both drivers and pedestrians.