Mileage sign

A mileage sign, sometimes also called a route confirmation sign in certain contexts, is a type of road sign along highways that displays the distance from the current point on a highway to a certain city, destination, or a junction sign another highway. The destinations listed can range from a short distance away, such as a few miles or kilometers, to long distances away, such as a hundred or couple hundred miles or kilometers away.

Generally, the distance that is calculated for these signs is not the distance to the border or city limits, but rather to the estimated "center" of a city. They also are not calculated by a straight-line from the sign to the city, but instead the distance along the ideally-quickest route to take, taking into account all the turns and curves drivers will take, and the distance may not be perfect. For example, U.S. Route 50, a cross-country route, has a sign in Sacramento, California stating that Ocean City, Maryland, its eastern endpoint, was 3,037 miles (4,888 km) away, whereas a sign in Ocean City once said that Sacramento was 3,073 miles (4,946 km) away.

They are different from reassurance signs which are signs that show the route number(s) of the highway a driver is on. The picture has a mileage sign with a reassurance sign of Interstate 70 in the background. They also differ from mile markers and mile posts, which are usually-small signs on the side of the road show the current length of a numbered highway from the start of its path. The same image also has a mile post with the number "168", showing that Interstate 70 has been running for 168 miles (270 km) in Pennsylvania at that mark.