New York New York most commonly refers to: * New York City, the most populous city in the United States, located in the state of New York * New York (state), a state in the northeastern United States New York may also refer to: Film and television * '' ...

, a reference marker is a small green sign mounted approximately every one-tenth mile on highways maintained by the New York State Department of Transportation. This was initiated in response to the Highway Safety Act of 1966 enacted by Congress, in an effort to monitor traffic and identify high-accident locations. New York's system inventories and indexes all touring and reference routes, in addition to service and rest areas, ramps, and reservation roads. New York's system is similar to California's

postmile California uses a postmile highway location marker system on all of its state highways, including U.S. Routes and Interstate Highways. The postmile markers indicate the distance a route travels through individual counties, as opposed to milesto ...

system in maintaining the state's highways and route logs. The

New York State Thruway Authority The New York State Thruway Authority (NYSTA) is a public benefit corporation in New York State, United States. The NYSTA was formed in 1950 with the responsibility of constructing, maintaining, and operating the New York State Thruway, a system ...

adopted its own reference system for the New York State Thruway system, including

I-287 Interstate 287 (I-287) is an auxiliary Interstate Highway in the US states of New Jersey and New York. It is a partial beltway around New York City, serving the northern half of New Jersey and the counties of Rockland and Westchester in New ...

. There is a similar reference marker system in use in neighboring

Vermont Vermont () is a state in the northeast New England region of the United States. Vermont is bordered by the states of Massachusetts to the south, New Hampshire to the east, and New York to the west, and the Canadian province of Quebec to the ...

Description

The reference markers (popularly referred to as "little green signs", or "tenth-mile markers") are green signs that measure wide by high and are placed every on state roads, freeways, and parkways. There are three rows of white numbers.

Top row

The top row indicates the route number. The letter "I" is used as a suff