According to Caltrans, it displays the name of the bridge, the county and route number, and the postmile. One of the common formats for postmiles are located on a freeway on bridges over cross streets. Each marker is stenciled with the route, county, and postmile at that location. 3 Similar reference markers in other jurisdictionsĪ postmile marker is placed along the state highway.Regardless, Caltrans will still use and maintain the postmile system on all freeways. Caltrans has not decided if the mile marker program will be expanded to all rural freeways. Currently, three freeway segments are a part of the experimental program: the Route 14 Freeway, the Route 58 Freeway in Kern County, and State Route 180 in Fresno. Included was a pilot program for the placing of mile markers along rural freeways. The state started the Cal-NExUS program in 2002, which would create a uniform exit numbering system for freeways. The postmile system is the only route reference system used by the California Department of Transportation (Caltrans).Ĭalifornia was the last state in the country to adopt mile markers, and exit numbers were not implemented until 2002. The postmile markers indicate the distance a route travels through individual counties, as opposed to milestones that indicate the distance traveled through a state. A typical postmile marker on State Route 1 in Monterey CountyĬalifornia uses a postmile highway location marker system on all of its state highways, including U.S.
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