its current routing and NY 37A on Van Rensselaer Road. During the same time period, NY 37 was rerouted to follow a new bypass around the southern edge of Ogdensburg. In the Massena area, NY 37 originally broke from its modern alignment west of the village and followed what is now NY 37B east to Main Street. Here, it turned south onto Main Street to traverse the Grasse River before continuing east on Orvis Street (and meeting modern NY 37B at Center Street) to reconnect to its current alignment east of the village. Lastly, from modern NY 131 adjacent to the Massena International Airport to Rooseveltown, NY 37 was initially routed on Trippany Road, NY 37C, and Roosevelt Road. In the mid-1950s, construction began on a new southern bypass of Massena that connected to NY 37 at the modern termini of NY 37B. It was completed and opened to traffic by 1958. Work on an eastward, divided highway extension of the bypass to Rooseveltown began . The final section, from the hamlet of Raquette River to Rooseveltown, opened to traffic later that year. On January 28, 2023, a collision between a truck and bus on NY 37 near Louisville killed 6 people and seriously injured 3. Suffixed routes NY 37 once had as many as four suffixed routes; two have since been removed. NY 37A was an alternate route of NY 37 between Ogdensburg and Waddington. It was assigned as part of the 1930 renumbering of state highways in New York to what is now NY 37 between the two locations. At the time, NY 37 was routed on Van Rensselaer Road. The alignments of NY 37 and NY 37A were flipped in the late 1950s. On April 10, 1980, the NY 37A designation was removed. Ownership and maintenance of Van Rensselaer Road was transferred from the state of New York to St. Lawrence County on September 1, 1982, at which time the highway was redesignated as CR 28. NY 37B () is the former routing of NY 37 through Massena. NY 37B leaves NY 37 west of the village and rejoins its parent just east of Massena. It was assigned as part of the 1930 renumbering. NY 37C () is a loop off of NY 37 in northeastern St. Lawrence County and northwestern Franklin County. While NY 37 follows a direct east–west routing between Massena and the Bombay community