 New York State Route 37B | ||||
|---|---|---|---|---|
 Map of the Massena area with NY 37B highlighted in red | ||||
| Route information | ||||
| Auxiliary route of NY 37 | ||||
| Maintained by NYSDOT | ||||
| Length | 4.03 mi[1] (6.49 km) | |||
| Existed | 1930[2]–present | |||
| Major junctions | ||||
| West end |  NY 37 in Louisville | |||
| East end | NY 37 in Massena | |||
| Location | ||||
| Country | United States | |||
| State | New York | |||
| Counties | St. Lawrence | |||
| Highway system | ||||
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New York State Route 37B (NY 37B) is an east–west state highway located in St. Lawrence County, New York, in the United States. It serves as a business route of NY 37 through the village of Massena. While NY 37B enters the village, NY 37 bypasses it to the south. The western terminus of the route is at an intersection with NY 37 in the town of Louisville. Its eastern terminus is at a junction with NY 37 just east of the village limits in the town of Massena. NY 37B intersects North Main Street, a state-maintained northward extension of NY 420, in Massena's central district.
The origins of NY 37B date back to the early 20th century when the New York State Legislature created Route 32, an unsigned legislative route extending from North Lawrence to Ogdensburg via Massena. From Waddington to Massena, Route 32 followed River Road and Town Line Road. This portion of the route became part of NY 3 in 1924. In the 1930 renumbering of state highways in New York, the Waddington–Massena segment of NY 3 became NY 37B. The route was extended east into Massena in the 1950s after NY 37 was realigned to follow a new bypass around the village.
Most of NY 37B west of Massena ran through a low-lying area along the St. Lawrence River. In 1958, this area was permanently indundated as part of the St. Lawrence Seaway's construction. As a result, NY 37B was rerouted to follow a new roadway along the fringe of Lake St. Lawrence to meet NY 37 in Louisville Corner. A connector between NY 37 and NY 37B in Louisville was designated as NY 131 by 1960. The alignments of NY 37B and NY 131 west of Massena were swapped c. 1962, placing NY 37B on its modern alignment.