postmile
A California Department of Transportation (Caltrans) term for a distance marker used to identify specific locations along state highways.
Definitions
A California Department of Transportation (Caltrans) term for a distance marker used to identify specific locations along state highways. Postmiles appear as small green signs along California roads and encode the county, route, and decimal mileage from a county boundary or route start. The system is used by highway engineers, emergency services, and navigation apps to pinpoint exact locations on a route. Outside California transportation contexts, the term is essentially unknown.
The collision was reported at postmile 14.3 on State Route 1 in Marin County.
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(US, California) highway location marker.
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