What Do Milepost Markers Indicate?

These "mile markers" show the number of miles from where the Interstate route

entered the state in which you are traveling. The counting always begins at the state line in the south (for north-south routes) and in the west (for east-west routes). So, mile marker numbers always get larger as you travel east or north.

What is the purpose of a milepost or distance marker?

California uses a postmile system on all of its state highways, including U.S. Routes and Interstate Highways. The postmile markers indicate the distance a route travels through individual counties, as opposed to mile markers that indicate the distance travelled through a state.

What are milepost signs?

Mile Markers Traffic Sign

Milepost markers are placed each mile along the edge of the roadway from one end of the state to the other. Zero always starts at south or west border where a route begins.