United States Milestone
typical mile marker used in united states
in u.s. interstate highway system, numbers measure distance southern or western state line, or route s terminus, if national southern or western terminus lies in state. numbering system other highways varies state; use system mirroring of interstate system, other states, such illinois , kentucky, use county line 0 mile marker, while others, including missouri, not sign mile-markers @ (except on interstates). arizona has rather unique system, route s mileposts continue original host. often, exits numbered according nearest milepost, known mile-log system. beginning of interstate system until mid-2000s, interstate highways had markers every mile. since time, many states have installed markers every 0.2 mile, , in metro areas, every 0.1 mile. historic , scenic routes – such along blue ridge parkway in north carolina , virginia , overseas highway of florida keys – use mileposts mark points of interest or (in cases of many businesses along overseas highway) portion of address.
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