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The State of 'New York' uses a 'reference marker' system similar to California's postmile system in maintaining the state's highways and route logs. In the 1980s the state added mileposts along freeways to measure distance traveled through the state. Prior to this, the reference marker system was the sole system used in New York. Around 1990 the New York State Thruway Authority adopted its own reference system for the New York State Thruway system, including I-287 and I-84.

Contents

Description

See also

References

Description

The reference markers are green signs that measure 200 mm wide by 252 mm tall and are placed every 1/10 of a mile (160 meters) on state roads, freeways, and parkways. There are three rows of white numbers.^[1]
The top row indicates the route number; an interstate highway is denoted with the letter "I" following the route number. There are additional letter suffixes for parkways, short connector roads, and long interchange ramps.
The first digit of the second row indicates the maintenance district (1 through 11, with District 10 being 0 and District 11 being "X"). The second digit indicates the county number, and the last two digits indicate the number of county lines the route has crossed.
The third row refers to the cities and towns through which a route passes. The first digit refers to the number of municipal boundaries crosses within a county, and the last three digits indicate the mileage (in tenths of miles) since the last municipal boundary was crossed.^[2]

See also

★ California postmile

References

1. NYSDOT Standard Sheets for Reference Markers, Delineators, and Snowplowable Markers
2. "Little Green Signs" Empire State Roads