Speed limit signs are important traffic signs that indicate the maximum speed at which vehicles are allowed to travel on a particular road. These signs help ensure safety by reducing the risk of accidents caused by speeding. The speed limits can vary based on the type of road, such as residential areas, highways, or school zones. Typically, speed limit signs display a number, which represents the speed in miles per hour (mph) or kilometers per hour (km/h). Drivers are expected to obey these limits, as exceeding them can lead to fines, points on a driving record, or even accidents.