The New York segment of US 9 can be divided into the section south of Albany, which parallels the
Hudson River closely, and the portion north of Albany, which takes in a long section of the eastern
Adirondacks.
New York City The
concurrency between US 1 and US 9 that began in New Jersey ends at the first exit from
I-95 on the
George Washington Bridge, when US 9 heads north via 178th and 179th streets to
Broadway. Broadway passes through the
Washington Heights neighborhood and then into
Inwood, the northernmost neighborhood on the island. The region in which US 9 passes through has a large Latino immigrant population. The northernmost section of the
New York City Subway's underground
IND Eighth Avenue Line ( train) runs along Broadway between
Dyckman Street and
Inwood–207th Street stations. On the corner of 204th Street is the
Dyckman House, the only original farmhouse left in Manhattan and a
National Historic Landmark (NHL). Near the island's northern tip, at the intersection with 215th Street, the elevated
IRT Broadway–Seventh Avenue Line ( train) of the New York City Subway joins Broadway. At the very tip of Manhattan, just past
Columbia University's
Robert K. Kraft Field at Lawrence A. Wien Stadium, US 9 crosses the
Harlem River Ship Canal via the
Broadway Bridge, into
Marble Hill, the only portion of Manhattan on the mainland.
Marble Hill station here is the first of several along US 9.
Westchester County The northwestern corner of the park marks the city limit and US 9 enters
Yonkers, where it is now known as South Broadway. It trends closer to the
Hudson River, remaining a busy urban commercial street. In downtown Yonkers, it drops close to the river, becomes North Broadway and NY 9A leaves via Ashburton Avenue. US 9 climbs to the nearby ridgetop runs parallel to the river and the railroad, a few blocks east of both as it passes
St. John's Riverside Hospital. The neighborhoods become more residential and the road gently undulates along the ridgetop. It remains Broadway as it leaves Yonkers for
Hastings-on-Hudson, where it splits into separate north and south routes for . The trees become taller and the houses, many separated from the road by stone fences, become larger. Another National Historic Landmark, the
Henry Draper Observatory, was the site of the first
astrophotograph of the
Moon. At the north end of the village of Irvington, a
memorial to writer
Washington Irving, after whom the village was renamed, marks the turnoff to his home at
Sunnyside. Entering into the southern portion of Tarrytown, US 9 passes by the historic
Lyndhurst mansion, a massive mansion built along the Hudson River in the early 1800s. North of here, at the
Kraft Foods technical center, the
Tappan Zee Bridge becomes visible. After crossing over the
New York State Thruway and I-87, here concurrent with
I-287, and then intersecting with the four-lane
NY 119, where NY 119 splits off to the east, US 9 becomes the busy main street of
Tarrytown.
Christ Episcopal Church, where Irving worshiped, is along the street. Many high quality restaurants and shops are along this main road. This downtown ends at the eastern terminus of
NY 448, where US 9 slopes off to the left, downhill, and two signs indicate that US 9 turns left, passing the
Old Dutch Church of Sleepy Hollow, another
NHL. The road then enters
Sleepy Hollow (formerly North Tarrytown), passing the visitors' center for
Kykuit, the NHL that was (and partially still is) the
Rockefeller family's
estate. US 9 expands to four lanes at the trumpet intersection with
NY 117; Broadway finally ends and US 9 becomes Albany Post Road. Entering
Ossining's
downtown, US 9 becomes Highland Avenue and continues to rise and fall, widen and narrow, through the riverside community.
Croton Expressway Just after Ossining, NY 9A returns and merges with US 9 as it crosses the mouth of the
Croton River and becomes the Croton Expressway. The only section built of the canceled
I-487, the highway is generally built to
Interstate standards. NY 9A leaves the
freeway and returns to two lanes, following the parent route's old course, at the second exit in
Croton-on-Hudson, where
NY 129 reaches its western end. US 9 passes
Indian Point Energy Center, a deactivated nuclear power plant that formerly supplied power to Westchester County and New York City. The facility is visible from the majority of the northern half of the expressway. The expressway veers inland for much of its route, preferring to follow the railroad tracks (the new
Cortlandt station is visible to the west at one point), rather than the river past the promontory at
Buchanan. NY 9A, as a surface street, ends at its parent at the Welcher Street exit. It continues on a reconstructed, widened section through
Peekskill. Despite recent upgrades to freeway standards, the northern end of the highway still maintains a lower speed limit. from the freeway's northern terminus,
US 202 and
US 6 join the freeway. NY 35 reaches its western terminus at that same junction. The four-lane freeway's northern terminus is at a stoplight at a three-way intersection with the
Bear Mountain State Parkway. The parkway continues straight from this intersection while US 6/US 9/US 202 turns left and crosses Annsville Creek. On the east fringe of Hudson's
historic downtown, US 9 intersects the northern terminus of NY 9G and
NY 23B. NY 23B runs concurrent with US 9 for a short distance eastward before splitting at Fairview Avenue, which US 9 follows out of Hudson. A commercial strip with turn lane gives way after to the lightly traveled rural two-lane US 9 north of Hudson. Near
Stockport, US 9 meets the southern terminus of
NY 9J. Farther north, after passing through
Kinderhook, home of another U.S. president,
Martin Van Buren, the road passes under NY 9H at a
grade-separated interchange before intersecting the northern terminus of NY 9H a short distance later outside
Valatie. seen from approach to Albany The highway widens to four lanes with a turn lane shortly after crossing into
Rensselaer County and will remain so for most of the rest of the way to
Albany, despite limited development and low traffic in some areas. Within of the county line it passes under the
New York State Thruway Berkshire Connector and meets the lone section of
I-90 in
New York not part of the thruway system, at exit 12 southeast of
Castleton-on-Hudson. north of I-90 and northwest of
Nassau, US 9 veers left to merge with
US 20 in
Schodack Center, and, together, they progress northwest toward Albany. Less than from the eastern terminus of the overlap, US 9 and US 20 intersect
NY 150 before connecting to I-90 at exit 11. When it actually enters Plattsburgh, it becomes first U.S. Avenue, then Peru Street when it passes the Old Catholic Cemetery. The
Saranac River draws alongside twice before US 9 takes a left turn at Bridge Street and crosses it. Just past the bridge, the highway turns left again onto City Hall Place at the center of town. US 9 passes in front of the
City Hall designed by
John Russell Pope, also the builder of the
Jefferson Memorial in
Washington DC. Two more quick lefts follow past the large
obelisk of Riverside Park, onto Miller and Cornelia streets, and then US 9 turns right at the eastern terminus of the lengthy
NY 3 to follow Margaret Street north and out of the city. It bends northeast to return to the lake shore shortly after the city limit, following alongside
Cumberland Bay. At the Dead Creek crossing, US 9 widens to four lanes for the first time since the Albany area to handle the heavy traffic at the junction with the eastern terminus of
NY 314, which continues east on
County Route 57 (CR 57) to another ferry connector, just southeast of the Northway. north of the junction, after
North Country Shopping Center, the highway returns to two lanes and the name Lakes to Locks Passage as it overlooks
Woodruff Pond and
Treadwell Bay. I-87 is visible to the east across the many open fields as the two roads parallel each other's turns closely. Another short route, CR 58, formerly
NY 456, comes in from the west and terminates at US 9 shortly after the right turn for
Point Au Roche State Park. Continuing northward, the road deviates to the east slightly in the town of
Chazy but returns to its previous track by the Interstate at the
Little Chazy River bridge. Shortly afterward, US 9 intersects
CR 23 (Miner Farm Road, formerly
NY 191 west of US 9). US 9 runs straight due north, no longer taking another name, to the next major intersection,
NY 9B (Lavalley Road), its last subroute. NY 9B does not terminate but instead runs to the lake shore and eventually north to
Rouses Point. A bend slightly to the west, closer to the Northway, brings the next stretch to US 9's last major intersection,
US 11, just south of
Champlain. US 9 winds through the quiet border village as its Main Street, turning west-northwest near Champlain's northern boundary to make its last water crossing over the
Chazy River. The route, still known as Main Street, heads northwest toward the Northway to follow it for the last , passing a few
customs brokerages toward its official end at the on-ramp to the last exit. Traffic to Canada must get on I-87 here. The roadway continues as the East Service Road, unsigned NY 971B, for another . This was the former route of US 9 to the border prior to the construction of the Northway. It is devoid of any development save some long vacant and abandoned lots, finally ending in a
parking lot south of the
border from which the
Canadian customs station at the south end of
Autoroute 15 is visible. ==History==