New York State Route 18

Niagara County

NY 18 begins at a junction with NY 104 south of a complex grade-separated interchange that includes NY 18F, NY 104, and the Niagara Scenic Parkway on the eastern edge of the village of Lewiston. From NY 104 east, a right-turn ramp allows access to Creek Road Extension, the first street that modern-day NY 18 occupies. NY 104 continues north from the ramp, passing over NY 18 westbound (which terminates at the merge ramp with NY 104 west) on its way to the village while NY 18 proceeds to the northeast on Creek Road Extension, bypassing Lewiston to the southeast. After 0.5 miles (0.8 km), the highway curves to the north and meets NY 104 at an unconventional grade-separated interchange that has a pair of two-way ramps connecting the two state routes. NY 18 continues on, passing under NY 104 and paralleling the Robert Moses State Parkway as it proceeds north.

At a wye in the Porter hamlet of Blairville, NY 18 breaks from its north–south alignment and turns to the northeast before curving northward once more, returning to a perfect north–south alignment at an intersection with NY 93 in the hamlet of Towers Corners. Southwest of the Four Mile Creek State Park, NY 18 turns a full 90 degrees to the east and begins to parallel the southern shore of Lake Ontario. Here, NY 18 meets the northern terminus of NY 18F, changes names from Creek Road to Lake Road, and becomes part of the Seaway Trail, a National Scenic Byway. The route proceeds northeast to Four Mile Creek State Park, where it intersects the northern end of the Robert Moses State Parkway. East of the park, NY 18 gradually moves to the north, decreasing the area between the route and the lakeshore as it proceeds east.

Now in Wilson and less than 100 yards (91 m) from the lakeshore, NY 18 meets the northern terminus of NY 425. Farther east, in Olcott, NY 18 intersects the northern extent of NY 78. On the eastern edge of town, the route intersects Transit Road, which runs along the transit line first surveyed by the Holland Land Company. This portion of Transit Road does not meet the NY 78-occupied portion in Lockport, however. After meeting the northern end of NY 148 in Somerset, NY 18 intersects the northern terminus of NY 269 at the Niagara–Orleans County line.

Orleans County

Across the county line, NY 18 becomes the Roosevelt Highway. It continues across the northern edge of the county and the southern fringe of Lake Ontario, meeting the northern terminus of NY 63 in Yates Center, north of Lyndonville. While NY 63 ends here, Lyndonville Road continues north to the lake as County Route 63-1 (CR 63-1). This portion of Lyndonville Road was once part of NY 63. In Carlton, NY 18 intersects the northern terminus of NY 279, the last in a series of north–south routes that terminate at NY 18. Not far to the east, the route serves Lakeside Beach State Park and indirectly connects to the western terminus of the Lake Ontario State Parkway. At this point, the Seaway Trail leaves NY 18 to follow the parkway along the lakeshore.

East of the park, NY 18 breaks from the Lake Ontario shore and begins to make its way southward, curving to the southeast as it meets NY 98 north of the hamlet of Baldwin Corner. The routes converge to form a concurrency south to the hamlet, where NY 18 continues east. At the Carlton–Kendall town line, NY 18 curves southeastward once again before reverting to an easterly alignment in Kendall. After passing NY 237 south of the hamlet of Kendall, NY 18 intersects NY 272 at the Orleans–Monroe County line. NY 18 merges onto the county line road, overlapping NY 272 along the county line for just under 1 mile (1.6 km) to the continuation of Roosevelt Highway, where NY 18 continues east into Monroe County.

Monroe County

NY 18 remains Roosevelt Highway until Hamlin–Parma Town Line Road, where is becomes West Avenue. In the hamlet of Hamlin, it meets NY 19. NY 18 passes NY 260 before swerving northward onto West Avenue at the Hamlin–Parma town line and proceeding eastward toward the village of Hilton. In Hilton, NY 18 meets NY 259 (Lake Avenue) in the center of the village. The two routes overlap for a short distance east along Main Street before turning south to exit the village on South Avenue.

NY 18 and NY 259, now named Hilton–Parma Corners Road, remain concurrent until Parma Center, where NY 18 turns east to follow Parma Center Road for roughly 2 miles (3.2 km) through a rural portion of Parma. Parma Center Road ends upon intersecting NY 261 (Manitou Road) at the Parma–Greece town line; as a result, NY 18 joins NY 261 for one block southward before returning east on Latta Road and entering the Rochester suburb of Greece. NY 18 passes through the rural northwestern part of the town and the more developed, densely populated northeastern section, meeting NY 390 at exit 26 in the latter. The junction is the northernmost exit on NY 390 prior to its merging with the Lake Ontario State Parkway to the north.

A small distance east of NY 390, NY 18 passes Greece Arcadia High School and intersects Mount Read Boulevard in the hamlet of Mount Read before intersecting Dewey Avenue a half-mile to the east. NY 18 turns south onto Dewey Avenue; however, state maintenance continues to follow Latta Road east to where it crosses into the Rochester city limits at Charlotte. This section of Latta Road is designated as NY 941A, an unsigned reference route. NY 18, meanwhile, becomes maintained by Monroe County as part of CR 132, an unsigned designation that follows Dewey Avenue north to its end at the Lake Ontario shoreline. The route continues south on Dewey Avenue to the Rochester city line, where CR 132 ends and maintenance of the route shifts to the city of Rochester. NY 18 ends about 1 mile (1.6 km) later at a junction with NY 104 in an industrialized area known as Kodak Park.

Origins and early changes

In 1908, the New York State Legislature created Route 18, an unsigned legislative route that ran from the Pennsylvania state line at Ripley to the mouth of the Niagara River north of Youngstown with a gap through the city of Buffalo. North of Buffalo, Route 18 followed Niagara Falls Boulevard (modern NY 950K and U.S. Route 62 or US 62) to Niagara Falls and current NY 104 and NY 18F between Niagara Falls and Lake Ontario. When the first set of posted routes in New York were assigned in 1924, the portion of legislative Route 18 north of Buffalo became the basis for NY 34, which began at Main Street (NY 5) in Buffalo and followed the path of legislative Route 18 through Niagara Falls and along the Niagara River to Lake Ontario. NY 18 was assigned at the same time; however, it initially went from the Pennsylvania state line at Limestone north to Buffalo along what is now US 219, NY 417, NY 353 and US 62. In Cattaraugus County, NY 18 initially followed Leon and New Albion Roads between Cattaraugus and Little Valley.

NY 18 was extended northeastward to Rochester as part of the 1930 renumbering of state highways in New York, effectively doubling the route's length. Instead of ending at the junction of Ohio and Main Streets (the latter then part of NY 5) in downtown Buffalo, NY 18 now overlapped with NY 5 along Main Street north to Niagara Falls Boulevard, where it turned north and proceeded to Lake Ontario over NY 34. At Youngstown, the route turned east, following a previously unnumbered alignment along the lakeshore to Rochester, where it ended at NY 31 (now NY 104) in Kodak Park. The route was extended further eastward to NY 250 in Webster by the following year by way of East Ridge Road, Culver Road, and Lake Road. NY 18 was never extended eastward past its junction with NY 250.

While the general routing of NY 18 between Youngstown and Rochester was the same in 1930 as it is now, it initially followed a slightly different alignment through eastern Orleans County and western Monroe County. NY 18 broke from its current alignment at Carr Road and followed Carr, Kenmore and Kendall Roads through the town of Kendall to the hamlet of Morton, from where it continued to Hamlin via the now-decommissioned NY 360 and NY 19. Additionally, NY 18 utilized Hamlin Center Road and what is now NY 260 between Hamlin and Roosevelt Highway.

The majority of NY 18's routing south of the village of Lewiston was incorporated into the U.S. Highway System in the early 1930s after US 62 and US 219 were extended into New York and US 104 was assigned. NY 18 now began concurrent to US 219 at the state line and overlapped the route northward to the city of Salamanca. US 219 left NY 18 here, and the latter continued independently to the town of Dayton, where it intersected US 62. From there, US 62 followed NY 18 north to a junction with US 104 (Main Street) in Niagara Falls. US 62 ended here, and NY 18 became concurrent to US 104 upon turning onto Main Street. The overlap ended in the village of Lewiston, where US 104 turned east to follow Ridge Road instead.

Realignments and truncation

By 1931, NY 18 was realigned to follow its current alignment between Hamlin and the Parma town line while the modern routing of NY 18 between the Orleans County line and Hamlin was designated as NY 360. The alignments of NY 360 and NY 18 between NY 272 and Hamlin were flipped c. 1933, placing both routes on their modern routings through Hamlin. NY 18 was moved onto its present routing through Kendall c. 1938, bypassing the hamlets of Kendall and Morton to the south. In the Buffalo area, NY 18 was realigned twice in the 1930s: first by 1935 to bypass downtown to the east on Bailey Avenue between Abbott Road and Main Street and again in the late 1930s to use Bailey Avenue and Eggert Road between Main Street and Niagara Falls Boulevard. The Cattaraugus–Little Valley segment of the route was realigned c. 1934 to travel directly between the two locations. Its former routing via New Albion became NY 18F; however, that designation was eliminated c. 1938.

NY 18 was rerouted between Lewiston and Youngstown on January 1, 1949, to follow a more inland highway through western Niagara County. The former routing of NY 18 alongside the Niagara River was redesignated as NY 18F. To the east in Rochester, NY 18 was realigned in the early 1950s to follow East Ridge Road east to the then-southern terminus of the Sea Breeze Expressway. The route turned north, following the highway to its end at Culver Road, where it rejoined its pre-expressway alignment. The western terminus of NY 18 was moved north to its present location in Lewiston on January 1, 1962, eliminating the three lengthy overlaps that existed between Pennsylvania and Lewiston. The lone independent portion of NY 18 south of Lewiston became an extension of NY 353.

On January 1, 1970, NY 47 was extended northward to encompass the entirety of the now-complete Sea Breeze Expressway, creating an overlap with NY 18 between Ridge and Culver Roads. Prior to the extension, NY 47 had ended at Empire Boulevard (US 104, now NY 404). The overlap proved to be temporary as NY 18 was truncated westward c. 1973 to its current eastern terminus in Kodak Park. The former routing of NY 18 between NY 590 and NY 250 was redesignated as NY 941L, an unsigned reference route. East Ridge Road, meanwhile, was now devoid of any designations as US 104 had been shifted onto the Keeler Street Expressway several years before. As a result, ownership and maintenance of the Irondequoit section of East Ridge Road was transferred to Monroe County, which designated it as the unsigned CR 241. Culver Road, meanwhile, is now CR 120.

Suffixed routes

NY 18 has had seven suffixed routes using six designations; only one, NY 18F, still exists. Most of the routes were renumbered when NY 18 was truncated to Lewiston c. 1962.