New York State Route 19

PA 449 becomes NY 19 just north of Genesee, Pennsylvania, as it runs along the Genesee River through a narrow valley. Just south of the first New York community it encounters, the hamlet of Shongo in the Town of Willing, it crosses the river. Running a little farther from the waterway, NY 19 reaches another hamlet, Stannards, several miles (kilometers) farther north, along with its first state highway junction, NY 248, which leaves to the east.

After Stannards, NY 19 crosses Chenunda Creek as the Genesee Valley widens somewhat, and continues north to the village of Wellsville, the largest community in Allegany County. It merges with NY 417, the east–west former route of NY 17 through the village, following a four-lane arterial along the Genesee River, which here runs through a concrete-lined flood control channel. North of Wellsville, the NY 19 corridor remains fairly well-developed as the highway makes its way to the smaller village of Belmont, the county seat. Here NY 19 crosses the Genesee River for the last time, and NY 244 leaves for Alfred to the east at the village center.

1 mile (1.6 km) past Belmont, NY 19 has its only direct freeway interchange, with the Southern Tier Expressway (Interstate 86 or I-86 and NY 17). Beyond it, it follows the river closely through the hamlet of Belfast, where NY 305 terminates. The next junction with another state highway, NY 243, comes at Caneadea, the next hamlet. It continues northward, passing through Houghton, home to Houghton College. NY 19A splits off in Fillmore to continue the riverside course and provide access to Letchworth State Park, while NY 19 climbs out of the valley and out of Allegany County.

After the short bend where it crosses the Wyoming County line, NY 19 bends slightly to the west as it comes into the hamlet of Pike 1 mile (1.6 km) to the north. The hamlet itself does not present any major intersections; however, NY 19 meets NY 39, the main east–west road across southern Wyoming County, northeast of the hamlet. The two routes overlap for just over 0.5 miles (0.8 km) before NY 19 turns back to the north and heads across mostly open fields to the next village, Gainesville, a few miles (kilometers) farther on. Again the intersecting state highway is displaced to the north of the village, where NY 78 heads off to the west despite being signed as a north–south route.

NY 19 through Warsaw

The route heads northeast from Gainesville to the hamlet of Rock Glen outside of Silver Springs, where NY 19A returns to its parent route and NY 19 passes under the Norfolk Southern Railway-owned Southern Tier Line. A few miles (kilometers) farther on, NY 19 reaches another county seat, Warsaw. The highway, along with the intersecting U.S. Route 20A (US 20A), serves as one of the village's two commercial axes. Upon leaving Warsaw to the north, NY 19, having trended slightly to the west since the state line, reaches its apex and begins to go slightly to the northeast for the remainder of the route. It begins this new course while running through the Wyoming Valley, formed by Oatka Creek, a tributary of the Genesee River. At the Middlebury–Covington town line, NY 19 takes a sudden right turn from its route to follow Schwytzer–East Bethany Road for 3 miles (4.8 km) to Silver Lake Road, where it once again assumes a due north heading as it begins to parallel the Rochester and Southern Railroad and enters Genesee County.

Almost immediately after the county line NY 19 intersects NY 63 at a traffic light in the hamlet of Pavilion. The similarly named but smaller Pavilion Center 2 miles (3.2 km) to the north marks the junction—a pseudo-parclo interchange—with US 20.

NY 19 at the US 20 interchange

NY 19 follows the Rochester and Southern Railroad into the village of Le Roy, where NY 19 intersects the state's other major east–west route, NY 5, and crosses the railroad as it turns eastward to access Caledonia. Outside of Le Roy, the route begins to leave Oatka Creek behind as the river and the route both descend the Onondaga Escarpment. Shortly afterwards, it crosses the I-90 segment of the New York State Thruway just west of where I-490 leaves the Thruway. While NY 19 is signed for this exit along the Thruway, access to it comes via the first exit on I-490, which is accessed via connector roads as the two highways do not directly intersect.

North of the Thruway, NY 19 enters the village of Bergen, intersecting NY 33 south of the village and NY 262 in the community itself. After passing the historic buildings of Lake Street, it crosses the CSX Transportation-owned Rochester Subdivision before exiting the village limits. Several miles (kilometers) later, after passing the Bergen Swamp Wildlife Refuge and crossing over Black Creek, it crosses its last county line, entering the rural southwestern corner of Monroe County. The route heads north through the lightly populated town of Sweden to a large commercial district located a short distance south of the southern boundary of Brockport, the largest community on NY 19's entire length. Here, NY 19, named South Lake Road, intersects NY 31, which enters from the west as Fourth Section Road and leaves to the east as Brockport–Spencerport Road.

NY 19 continues north into Brockport, where the road crosses the Erie Canal and passes SUNY Brockport and the Morgan–Manning House as Main Street. Less than 1 mile (1.6 km) northeast of the village, NY 19 reaches NY 104 (Ridge Road) at the hamlet of Clarkson Corners. Now known as North Lake Road, and eventually just Lake Road, NY 19 assumes a straight course again through the several miles (kilometers) of open country to its next junction, NY 18 at Hamlin. Just north of the quiet hamlet, Lake Road splits into east and west branches at a fork in the road. While unsigned CR 234 (former NY 360) branches off to the northwest on the west fork, NY 19 takes the east fork and heads northeast from the hamlet. A few miles (kilometers) more brings the route to North Hamlin and finally its northern terminus at the Lake Ontario State Parkway. Lake Road East Fork, at this point no longer part of NY 19, continues across the parkway to serve two Lake Ontario beach communities.

NY 19 Truck in Brockport is a route that serves as a bypass around a low bridge carrying the Falls Road Railroad over NY 19 in the village. It begins at the intersection of NY 31 and NY 19 south of Brockport and follows NY 31 westward on Fourth Section Road and northward on Redman Road to West Avenue. At West Avenue, NY 19 Truck splits from NY 31 and travels east on West Avenue to rejoin NY 19 north of the village.[19]

The West Avenue leg of NY 19 Truck was originally designated as part of NY 31. In the early 1980s, NY 31 was rerouted to bypass Brockport on Redman and Fourth Section roads.[20][21] West Avenue was redesignated as NY 943B, an unsigned reference route.[22] In 2007, ownership and maintenance of NY 943B was transferred from the state of New York to Monroe County as part of a highway maintenance swap between the two levels of government. A bill (S4856, 2007) to enact the swap was introduced in the New York State Senate on April 23 and passed by both the Senate and the New York State Assembly on June 20. The act was signed into law by Governor Eliot Spitzer on August 28. Under the terms of the act, it took effect 90 days after it was signed into law; thus, the maintenance swap officially took place on November 26, 2007.[17] The former routing of NY 943B is now designated as the unsigned CR 281.[23]

NY 19 Truck in Belmont was a route that served as bypass around a bridge over the Genesee River on NY 19. The route began at the junction of Willetts Avenue (NY 19) and Genesee Street (NY 244) and followed Genesee Street northeastward across the Genesee River to Greenwich Street in the northern portion of the village. Here, NY 19 Truck split from NY 244 and turned southeastward, following Greenwich Street back to NY 19 east of the village center.[24] The bypassed bridge was originally built in 1935 and had an operating rating of 10 metric tons (11 short tons) and a sufficiency rating of 3%.[25] In late 2008, work began on a new bridge to replace the existing structure on NY 19. The new bridge cost $4.5 million and was opened to traffic on October 22, 2009. Signage for NY 19 Truck was removed following the completion of the project.[26]