Milemarker

A milestone or kilometre sign is one of a series of numbered markers placed along a road at regular intervals, typically at the side of the road or in a median. Milestones are constructed both to reassure the traveller that the prope

A milestone or kilometre sign is one of a series of numbered markers placed along a road at regular intervals, typically at the side of the road or in a median. Milestones are constructed both to reassure the traveller that the proper path is being followed and to indicate distance travelled. They are alternately known as a mile marker, milepost, or mile post (sometimes abbreviated MP), notably in the United States.

The historical term milestone is still used today, even though the "stones" are typically metal signs. More closely spaced signs, with fractional numbers, and signs along a railway or beach also occur.