NY 27 highlighted in red
|Maintained by NYSDOT, NYCDOT and Suffolk County|
|Length||120.58 mi (194.05 km)|
|West end||I-278 in Brooklyn|
| Belt Parkway in Howard Beach|
I-678 / NY 878 in South Ozone Park
Belt Parkway in Laurelton
Meadowbrook State Parkway in Freeport
Wantagh State Parkway in Wantagh
NY 135 in Seaford
Robert Moses Causeway in West Islip
Heckscher State Parkway in Islip Terrace
NY 24 in Hampton Bays
|East end||Montauk Point State Park in Montauk|
|Counties||Kings, Queens, Nassau, Suffolk|
New York State Route 27 (NY 27) is a 120.58-mile (194.05 km) long state highway that runs east-west from Interstate 278 (I-278) in the New York City borough of Brooklyn to Montauk Point State Park on Long Island, New York. Its two most prominent components are Sunrise Highway and Montauk Highway, the latter of which includes the Montauk Point State Parkway. NY 27 acts as the primary east–west highway on southern Long Island east of the interchange with the Heckscher State Parkway in Islip Terrace. The entire route in Suffolk, Nassau, and Queens counties was designated by the New York State Senate as the POW/MIA Memorial Highway. The highway gives access to every town on the South Shore. NY 27 has service roads that parallel the highway continuously from North Lindenhurst to Patchogue, and intermittently to the east into Southampton. They are officially designated, but not signed, as New York State Route 906C and New York State Route 906D.
Prospect Expressway and Linden Boulevard
NY 27 begins at exit 24 of I-278 (the Gowanus Expressway) in the borough of Brooklyn in New York City. For the first stretch through Brooklyn, NY 27 runs along the Prospect Expressway — a sunken six-lane freeway through the Park Slope and Windsor Terrace neighborhoods — providing interchanges with Fourth Avenue, Seventh Avenue, and 11th Avenue. At exit 5, eastbound NY 27 leaves the Prospect Expressway, which then interchanges with Ocean and Fort Hamilton Parkways before ending a short distance to the south at exit 6 and Church Avenue. Eastbound NY 27 follows East 5th Street to Caton Avenue; westbound NY 27 leaves Caton Avenue at Coney Island Avenue, then follows Church Avenue to the Prospect Expressway.
NY 27 runs along Caton Avenue near the south end of Prospect Park. A couple blocks east, the street merges into Linden Boulevard, crossing eastward through Brooklyn on Linden. NY 27 passes east through East Flatbush and reaches a large intersection with Kings Highway and Remsen Avenue, where it expands into a four-lane boulevard through Brooklyn with frontage roads. East of East 96th Street, NY 27 intersects Rockaway Parkway and then travels under the BMT Canarsie Line, winding through New Lots before turning northeast. After crossing under a nearby subway yard, the boulevard passes through the City Line neighborhood. Near the junction with Ruby Street, NY 27 enters the borough of Queens, but retains the Linden Boulevard name.
Continuing northeast through Queens, NY 27 and Linden Boulevard enter Ozone Park and reach an interchange with Conduit Avenue, where Linden Boulevard ends and NY 27 continues eastward along the divided Conduit Avenues. Becoming the Nassau Expressway, the route soon parallels the Belt Parkway as it interchanges westbound via exit 17W. Now a frontage road for the parkway, NY 27 is divided on each side, passing south of Aqueduct Racetrack. When the Nassau Expressway (NY 878) splits off, NY 27 continues east along Conduit Avenue and remains a frontage road for multiple exits of the limited-access highway. The route interchanges with I-678 (the Van Wyck Expressway) a short distance later.
NY 27 remains a frontage road entering the Springfield Gardens, crossing multiple exits of the Belt Parkway until entering Laurelton. In Laurelton, the Belt Parkway turns northward while NY 27 continues eastbound as South Conduit Avenue and westbound as Sunrise Highway, but stays a seven-lane divided boulevard (four eastbound and three westbound). The route crosses Francis Lewis Boulevard and south of the Rosedale Long Island Rail Road station; just east of Hook Creek Boulevard, NY 27 enters Nassau County and becomes the Sunrise Highway.
Sunrise Highway begins as a six to eight lane arterial highway in eastern Queens. It heads east into Nassau County, passing through Valley Stream and Rockville Centre on its way to Merrick. There it connects to the Meadowbrook State Parkway by way of an interchange. NY 27 continues to Wantagh, where it has an interchange with the Wantagh State Parkway. One mile later, the highway has an interchange with NY 135 in Seaford. NY 27 then enters Suffolk County, where it veers to the northeast, bypassing Copiague. At the interchange with NY 109 in West Babylon, Sunrise Highway becomes a six-lane expressway with two two-lane service roads. The route then meets the Robert Moses Causeway near West Islip. In East Patchogue, New York, the highway is reduced to a four-lane expressway after passing the NY 112 exit.
Between County Route 16 (CR 16) in Brookhaven and CR 46 in Shirley, the median is lined with pine trees along South Haven County Park. The setting along these roads is similar to the one on the Southern State Parkway west of Belmont Lake State Park. The last exit with a state highway is near Hampton Bays, where it meets NY 24.
East of NY 24, Sunrise Highway crosses over the Shinnecock Canal and has one last eastbound exit before merging with CR 39. It changes names to North Highway, a four-lane undivided highway more commonly known as the Southampton Bypass. The highway continues east near toward village of Southampton before ending at an intersection with Montauk Highway. NY 27 turns east at that junction, following Montauk Highway toward Water Mill and points east.
The section of Montauk Highway over which NY 27 runs is two lanes wide, with the exception of the four-lane sections in the village of East Hampton. This section of NY 27 is concurrent with New York State Bicycle Route 27. NY 27 heads generally northeastward to East Hampton village where it becomes Woods Lane, and later, Main Street. It has an intersection with the southern end of NY 114 before entering downtown. After passing Newtown Lane and North Main Street, NY 27's name changes to Pantigo Road, as it passes an eponymous historic district, listed on the National Register of Historic Places.
In the hamlet of Amagansett, NY 27's name changes back to Main Street, again returning to the Montauk Highway name. The road becomes Montauk Point State Parkway as it enters Hither Hills State Park in Napeague. The parkway, a Robert Moses-designed highway, carries NY 27 to its eastern terminus at Montauk Point State Park, on the east side of Montauk. The final 10 miles of NY 27 is known as Montauk Point State Parkway.
Designation and early realignments
NY 27's designation was assigned in the mid-1920s to a road extending from the New York City line to Amagansett. It began at the point where Merrick Road exited Queens and entered Nassau County. It mostly followed Merrick Road and Montauk Highway east to Amagansett. From East Patchogue to Brookhaven, NY 27 followed South Country Road, passing through the downtown section of the village of Bellport. The NY 27 designation was extended eastward along Montauk Highway to Montauk Point by 1930.
On February 24, 1930, South Country Road was added to the Suffolk County highway system as CR 36. NY 27 was subsequently realigned to follow Montauk Highway between East Patchogue and Brookhaven.
NY 27 was realigned west of Oakdale c. 1931 to follow Sunrise Boulevard, a new highway parallel to Merrick Road, and then Montauk Highway, between the New York City line and Massapequa connecting several local roads from Massapequa to Montauk Highway at Oakdale. The former routing of NY 27 from Massapequa to Oakdale became NY 27A, connecting to NY 27 in Massapequa by way of County Line Road.
Sunrise Boulevard was extended eastward to Oakdale c. 1934 as a realignment of NY 27. One portion of NY 27's former route between NY 27A in Massapequa and the Suffolk County line is known as Old Sunrise Highway, and remains state-maintained to this day as NY 900D, an unsigned reference route.
New York City
In December 1934, the route was extended westward into New York City. NY 27 followed Sunrise Highway, Linden Boulevard, and Flatbush Avenue through Queens and Brooklyn to the Manhattan Bridge, where it continued into Manhattan along Canal Street to a terminus at 6th Avenue (then-U.S. Route 1A and later NY 1A).
The route was realigned slightly in the early 1940s to follow Atlantic and Washington Avenues, Eastern Parkway, Buffalo Avenue, and Rockaway Avenue between Flatbush Avenue and Linden Boulevard. NY 27 was again altered in the mid-1960s to continue west on Linden Boulevard, Caton Avenue, and Church Avenue to the south end of the Prospect Expressway. There, the route turned north, following the freeway to its end at the Gowanus Expressway (then-NY 27A), where NY 27A now ends. The Prospect Expressway was planned by Robert Moses, and was constructed during the 1950s.
Prior to 1970, NY 27A continued north to the Holland Tunnel in Manhattan by way of the Gowanus Expressway, the Brooklyn–Battery Tunnel, and the West Side Elevated Highway. On January 1, 1970, NY 27A was truncated eastward to its current western terminus in Massapequa while NY 27 was extended northward along NY 27A's former route to the Holland Tunnel, where it ends at I-78 and NY 9A.
By 1973, NY 27 was cut back to its interchange with the Gowanus Expressway while I-478 was assigned to both the Battery Tunnel and all of the West Side Elevated Highway south of the Lincoln Tunnel.
Robert Moses developed plans for an elevated expressway featuring 10 to 12 lanes along Sunrise Highway through Nassau County. This expressway would have provided a truck link for the South Shore of Long Island but the downtown villages along the route effectively put a stop to the idea.
The portion of Sunrise Highway between North Lindenhurst and the town of Southampton was gradually upgraded to a limited-access highway. At the east end of NY 27 the highway abruptly became a three-lane highway east of the Shinnecock Canal, at the point where NY 27 is concurrent with CR 39. This area was known as the "Shinnecock Squeeze" as traffic on the two-lane eastbound NY 27 was "squeezed" into a single lane.
At the end of summer 2007, another eastbound lane was added, heading eastward to North Sea Road. The construction snarled traffic on CR 39. The Long Island Rail Road added three trains each way between Speonk and East Hampton during the construction. The new eastbound lane opened in April 2008. Now a four-lane highway between the eastern end of Sunrise Highway and North Sea Road, NY 27 has been widened to accommodate future summer backups and thus avoiding the "Shinnecock Squeeze."
The first proposals for an extension east of the Shinnecock Canal were made in the 1950s. In 1969, the New York Legislature approved a $160 million plan for the extension. It was a limited access route, flanked by bicycle and equestrian trails. The eastbound and westbound roadways were to be separated by wide wooded medians. For the most part, the road was to run a mile or two north of existing NY 27, thus avoiding the populated centers through which it now passes. The extended Sunrise Highway would have had interchanges with CR 38 (North Sea Road) and CR 39 (County Road), CR 79 (Bridgehampton–Sag Harbor Road), NY 114 (East Hampton–Sag Harbor Turnpike), CR 40 (Three Mile Harbor Road), and CR 45 (Amagansett–Springs Road) before merging back into the existing Montauk Highway. The exits would have been sequentially numbered from 67 to 72. The plan failed, and Governor Hugh Carey canceled it in 1975. Other suggestions have included building a limited-access road on either side of Long Island Rail Road's Montauk Branch.
As Sunrise Highway was upgraded during the 1970s and 1980s many interchanges were redesigned and replaced. The original interchange with the Robert Moses Causeway in West Islip had two parkway-style arch bridges over two lanes of NY 27. When the service roads were built in Western Islip Township between 1969 and 1972, parkway-style bridges were added for them as well. The interchanges at Fifth Ave and Brentwood Road in Bay Shore had parkway-style arch bridges and cloverleafs. When the service roads were added, the parkway-style bridges were removed and replaced with the modern structures that exist today and the original cloverleafs were modified to align with the new service roads.
As with interchanges to the west, Islip Avenue (NY 111) and Carleton Avenue (CR 17) in Islip Terrace originally had parkway-style bridges crossing over Sunrise Highway. However, only Islip Ave had a partial clover leaf on the west side of the bridge. The eastern side of the bridge used side streets for access, as did both sides of the Carleton Ave bridge. This section of Sunrise Highway wasn't divided. Since 1983, both areas have more modern bridges over the service roads, and the old cross streets connect to those service roads or other side roads instead. Islip Avenue connects to NY 27 at exit 45 while Carleton Avenue meets the Sunrise Highway at exit 46.
Proposed interchanges and crossings
Besides the replacement of interchanges in Western Suffolk County, Sunrise Highway has had proposed interchanges and crossings that were either never built, or were built according to alternate design specifications.
In the North Lindenhurst area, plans to construct a cloverleaf interchange with CR 2 (Straight Path) in Copiague have existed for some time. In recent years, planners have realized that such an interchange would be too close to the cloverleafs with CR 47 (Great Neck Road) to the west and CR 3 (Wellwood Road) to the east. To further complicate matters, a widened CR 28 was extended to Sunrise Highway near the Straight Path intersection in the late-1980s. To date, no interchange has been built for this area.
The Oakdale Merge is a convergence of Sunrise Highway and Montauk Highway between Great River and Oakdale abutting the southern edge of Connetquot River State Park. The Montauk Highway predates the Sunrise Highway in the area. When Sunrise Highway was extended east of Amityville in 1940, it terminated at Montauk Highway's entrance to Connetquot River State Park.
In 1953, Sunrise Highway was extended to East Patchogue; a 0.5 mi (0.80 km) overlap of NY 27 and NY 27A was created, with at-grade intersections connecting the highways. A segment of this alignment remains south of the eastern interchange.
NY 27A was truncated east of the overlap in 1972. Plans to upgrade the interchange have existed since its creation.
During the early-1960s, the Suffolk County Department of Public Works considered designating a county highway to connect Nicolls Road in Lake Grove through the Long Island MacArthur Airport, then on to the east end of the merge. As recently as 1981, the New York State Department of Transportation planned to add service roads and a proper interchange at both ends of the merge. Pressure from environmental groups seeking to avoid damaging the parkland stalled construction. NYSDOT eventually reconstructed Sunrise Highway in eastern Islip township into a freeway during the 1990s, resulting in the present configuration.
The entrance to Connetquot River Park remained as an at-grade intersection, accessible only from the westbound lane. Former segments of Montauk Highway now exist on both sides of the interchange, and sections of both roads were converted into fishing areas owned by the New York State Department of Environmental Conservation. Numerous accidents occurred at the east end of the merge, resulting in its reconstruction in 1999. A new off-ramp to the service road for Pond Road was built, resulting in renumbering of exit 47 to exit 46A.
While none of the interchanges north of Patchogue were built until 1988 to 1993, the New York State Department of Transportation (NYSDOT) had known the need for them, and had planned them decades before their eventual construction. As an example, Waverly Avenue (CR 19) was originally proposed as a cloverleaf interchange. Today, exit 52 with CR 19 is a diamond interchange instead. North Ocean Avenue (CR 83) was originally proposed to be accessible via connecting ramps to side streets including Austin Street along the eastbound lane and Sinn Street along the westbound lane. Today, exit 53A is a half-diamond interchange while Austin Street and Howard Street are now dead end streets, and Sinn Street never reached North Ocean Avenue.
Maple Avenue had crossed the median on NY 27 between North Ocean Avenue and NY 112 until 1975. This road could also have been used as a connecting ramp to both roads. Today, the north section only intersects the westbound service road, while the south section was converted into a dead end street north of Austin Street. NY 112 was originally proposed to be accessible via connecting ramps to side streets such as Franklin Street along the eastbound lane and an extension of Sinn Street along the westbound lane.
Sinn Street was acquired by NYSDOT east of NY 112 in the early-1960s, and was gradually abandoned. Today, exit 53 is a diamond interchange, and Sinn Street, Austin Street, and Franklin Street are now dead-end streets. Originally there were proposals to connect Washington Avenue and Phyllis Drive via ramps to side streets such as Franklin Street along the eastbound lane, and to an extension of Sinn Street along the westbound lane.
Phyllis Drive was once part of NY 27 until Sunrise Highway was extended to Eastport in 1957. Today, both roads are only accessible via the service roads. Some residents are waiting for a potential pedestrian bridge connecting the two ends of Washington Avenue.
NY 27A (17.31 miles or 27.86 kilometres) is an alternate route of NY 27 across southern Long Island from Massapequa Park to Oakdale, accessing Babylon and Islip. It was designated NY 27A c. 1931.
|Brooklyn||Greenwood Heights||0.00||0.00||–||I-278 east (Brooklyn-Queens Expressway) to I-478 (Hugh L. Carey Tunnel) – Queens, Bronx, Manhattan||Western terminus; exit 24 (I-278)|
|0.01||0.016||1||Hamilton Avenue||Westbound exit only; to Hugh L. Carey Tunnel|
|South Slope||0.24||0.39||2||3rd Avenue / 4th Avenue to I-278 west (Brooklyn-Queens Expressway) – Staten Island||Eastbound entrance and westbound exit|
|0.61||0.98||3||7th Avenue / 8th Avenue||Eastbound entrance and westbound exit|
NY 27 Truck east (10th Avenue) / 11th Avenue
|Eastbound exit and westbound entrance|
|1.45||2.33||5||NY 27 east / Fort Hamilton Parkway||NY 27 leaves the expressway eastbound|
|Kensington||1.76||2.83||6||Church Avenue / Ocean Parkway south – Coney Island||At-grade intersection with no left turns; NY 27 joins the expressway westbound|
|East end of freeway section|
|Queens||Howard Beach||–||Conduit Avenue west to Atlantic Avenue||Partial interchange with no eastbound access; site of formerly proposed Bushwick Expressway|
|–||Cross Bay Boulevard – Riis Park||Interchange|
|9.03||14.53||NY 27 transitions to Belt Parkway service roads|
|–||Belt Parkway – Verrazano Bridge, Eastern Long Island||Same-directional interchange only; exit 17W on Belt Parkway|
|South Ozone Park||–||NY 878 east (Nassau Expressway) to I-678 (Van Wyck Expressway) – Kennedy Airport||Westbound exit only; exits 18B-19 on Belt Parkway; western terminus of NY 878|
|–||Lefferts Boulevard – Aqueduct Racetrack, Long-Term Parking||Eastbound exit and westbound at-grade intersection|
|11.51||18.52||–||I-678 (Van Wyck Expressway) – Kennedy Airport, Whitestone Bridge, Bronx||Westbound exit and entrance; exit 1 on I-678|
|–||150th Street – Kennedy Airport||Eastbound interchange and westbound at-grade intersection|
|–||JFK Expressway south – Kennedy Airport||Westbound exit and eastbound entrance|
|Laurelton||14.71||23.67||–||Belt Parkway west – Verrazano Bridge||Exit 23B on Belt Parkway; NY 27 leaves Belt Parkway service roads|
|Nassau||Rockville Centre||Merrick Road||Interchange with directional access (eastbound to eastbound and westbound to westbound) only|
|Freeport||23.89||38.45||Meadowbrook State Parkway – Mineola, Jones Beach||Exit M8 on Meadowbrook Parkway|
|Wantagh||26.73||43.02||Wantagh State Parkway – Westbury, Jones Beach||Exit W5 on Wantagh Parkway|
|Seaford||27.93||44.95||NY 135 north (Seaford–Oyster Bay Expressway) – Syosset||Exit 2 on NY 135|
|Massapequa||28.83||46.40||NY 107 (Hicksville Road)|
|Massapequa Park||31.04||49.95||NY 27A east (Old Sunrise Highway)||Western terminus of NY 27A|
|Suffolk||Amityville||32.07||51.61||NY 110 – Amityville, Huntington||Interchange|
|Copiague||32.94||53.01||CR 47 (Great Neck Road) – Copiague, Farmingdale||Interchange|
|Lindenhurst||34.17||54.99||CR 3 (Wellwood Avenue) – Lindenhurst, Melville||Interchange|
|West end of freeway section|
|35.32||56.84||37||NY 109 (Babylon-Farmingdale Road) – Babylon, Farmingdale|
|West Babylon||36.45||58.66||38||Little East Neck Road / Belmont Avenue|
|North Babylon||38.26||61.57||40||NY 231 (Babylon-Northport Expressway) – Babylon, Huntington|
|West Islip||39.75||63.97||41||Robert Moses Causeway – Robert Moses Park, Sunken Meadow Park||Exit RM1 on Robert Moses Causeway|
|Brightwaters||42||Manor Lane||Westbound exit and eastbound entrance|
|Bay Shore||41.13||66.19||43||CR 13 (Fifth Avenue) – Bay Shore, Brentwood|
|42.40||68.24||44||Brentwood Road – Brentwood, Bay Shore|
|Community of Islip||44.06||70.91||45||NY 111 (Islip Avenue) – Islip, Smithtown|
|East Islip||45.74||73.61||46||Heckscher State Parkway / CR 17 / Connetquot Avenue – East Islip, Heckscher Park, New York||No westbound signage for CR 17; exit 44 on Heckscher Parkway|
|45.79||73.69||–||Suffolk County Water Authority||Unnumbered westbound exit|
|46.54||74.90||–||Connetquot State Park||Unnumbered westbound exit|
|47.41||76.30||46A||NY 27A west / CR 85 east (Montauk Highway) – Oakdale, Great River||Eastbound exit only; eastern terminus of NY 27A|
|Oakdale||47||Pond Road south||Eastbound exit only|
|47A||Oakdale–Bohemia Road – Bohemia, Oakdale||Eastbound exit and westbound entrance|
|50.16||80.72||48||Locust Avenue – Bohemia, Oakdale|
|Sayville||51.06||82.17||49||CR 93 (Lakeland Avenue) / Johnson Avenue – Ronkonkoma, Sayville, MacArthur Airport||No signage for Johnson Avenue westbound|
|50A||Johnson Avenue – Sayville, Bohemia, MacArthur Airport||Westbound exit only; formerly CR 112|
|50||Lincoln Avenue – Ronkonkoma, Sayville||No westbound entrance|
|Bayport||52.44||84.39||51||CR 97 / NY 454 west – Blue Point, Stony Brook, Commack, MacArthur Airport||No eastbound access to NY 454; eastern terminus of NY 454|
|Patchogue||54.07||87.02||52||CR 19 (Waverly Avenue) – Holbrook, Patchogue|
|54.82||88.22||52A||CR 83 (North Ocean Avenue) – Farmingville, Patchogue||Eastbound exit and westbound entrance; southern terminus of CR 83|
|55.31||89.01||53||NY 112 – Port Jefferson, Patchogue||No eastbound signage for CR 83|
|East Patchogue||56.72||91.28||54||Hospital Road – Patchogue||Serves Brookhaven Memorial Hospital|
|57.48||92.51||55||CR 101 – Patchogue, Yaphank|
|North Bellport||58.42||94.02||56||Station Road – Bellport, Yaphank|
|Community of Brookhaven||60.47||97.32||57||CR 16 (Horseblock Road) / CR 21 (Yaphank Avenue) – Brookhaven, Yaphank||Signed as exits 57N (north / west) and 57S (south / east)|
|Shirley||62.65||100.83||58||CR 46 (William Floyd Parkway) – Shirley, Wading River||Signed exits as 58N (north) and 58S (south)|
|Center Moriches||66.35||106.78||59||Wading River Road – Wading River, Center Moriches||Formerly CR 25|
|67.28||108.28||60||Railroad Avenue – Center Moriches, Manorville||Westbound exit and eastbound entrance|
|Eastport||69.60||112.01||61||CR 51 – East Moriches, Riverhead, Eastport||Eastbound exit and westbound entrance; other movements via exit 62|
|70.96||114.20||62||CR 111 – Manorville||Originally planned as a cloverleaf interchange with collector/distributor roads|
|Westhampton Beach||75.47||121.46||63||CR 31 – Westhampton Beach, Riverhead||Signed as exits 63N (north) and 63S (south); serves Francis S. Gabreski Airport|
|East Quogue||76.95||123.84||64||CR 104 – Quogue, East Quogue, Riverhead||Signed as exits 64N (north) and 64S (south); formerly NY 113|
|Hampton Bays||81.15||130.60||65||NY 24 – Hampton Bays, Riverhead||Signed as exits 65N (north) and 65S (south)|
|82.94||133.48||66||North Road (CR 39) – Shinnecock Hills||Quarter-cloverleaf interchanges|
|Shinnecock Hills||–||CR 39 west (North Road) – Hampton Bays||Westbound exit only; western terminus of concurrency with CR 39|
|East end of freeway section|
|Tuckahoe||CR 52 north – North Sea, Sag Harbor||Southern terminus of CR 52|
|Village of Southampton|| CR 38 north – North Sea, Southampton|
CR 39 west / CR 39A east
|Southern terminus of CR 38; CR 39 transitions to CR 39A|
|89.68||144.33||Montauk Highway west – Southampton||Eastern terminus of CR 39A|
|Bridgehampton||CR 79 north – Sag Harbor, Shelter Island||Southern terminus of CR 79|
|Village of East Hampton||100.17||161.21||NY 114 north – Sag Harbor, Shelter Island||Southern terminus of NY 114|
|Montauk||120.58||194.05||Montauk Point State Park||Eastern terminus; loop around parking lot|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- "New York's Main Highways Designated by Numbers". The New York Times. December 21, 1924. p. XX9. Retrieved July 18, 2010.
- Official Map Showing State Highways and other important roads (Map). Cartography by Rand McNally and Company. State of New York Department of Public Works. 1926.
- "2008 Traffic Data Report for New York State" (PDF). New York State Department of Transportation. June 16, 2009. pp. 160–162. Retrieved January 28, 2010.
- Microsoft; Nokia (February 24, 2013). "overview map of NY 27 (Prospect Expressway to Nassau County border)" (Map). Bing Maps. Microsoft. Retrieved February 24, 2013.
- "National Register Information System". National Register of Historic Places. National Park Service. 2008-04-15.
- Rand McNally Auto Road Atlas – New York and Vicinity (Map). Rand McNally and Company. 1926. p. 86. Retrieved January 28, 2010.
- Dickinson, Leon A. (January 12, 1930). "New Signs for State Highways". The New York Times. p. 136. Retrieved July 18, 2010.
- Suffolk County Department of Public Works. "County Road System – County of Suffolk, New York" (PDF). Retrieved May 24, 2009.
- Texaco Road Map – New York (Map). Cartography by Rand McNally and Company. Texas Oil Company. 1932.
- Road Map of New York (Map). Cartography by General Drafting. Standard Oil Company of New York. 1930.
- New York (Map). Cartography by H.M. Gousha Company. Kendall Refining Company. 1931.
- Texaco Road Map – New York (Map). Cartography by Rand McNally and Company. Texas Oil Company. 1933.
- Road Map of New York (Map). Cartography by Rand McNally and Company. Texas Oil Company. 1934.
- New York State Department of Transportation (January 2012). Official Description of Highway Touring Routes, Bicycling Touring Routes, Scenic Byways, & Commemorative/Memorial Designations in New York State (PDF). Retrieved February 16, 2012.
- "Excavating And Pipe Laying Apparatus In Use On The Brooklyn Aqueduct". Scientific American. January 3, 1891.
- "Mark Ways in the City". The New York Times. December 16, 1934. p. XX12. Retrieved July 18, 2010.
- Map of New York (Map). Cartography by H.M. Gousha Company. Shell Oil Company. 1940.
- New York with Pictorial Guide (Map). Cartography by General Drafting. Esso. 1942.
- New York and Metropolitan New York (Map). Cartography by Rand McNally and Company. Sinclair Oil Corporation. 1964.
- Gousha Road Atlas (Map). Cartography by H.M. Gousha Company. H.M. Gousha Company. 1967. p. 56. Retrieved January 28, 2010.
- State of New York Department of Transportation (January 1, 1970). Official Description of Touring Routes in New York State (PDF). Retrieved May 24, 2009.
- New York (Map) (1973 ed.). Cartography by H.M. Gousha Company. Shell Oil Company. 1973.
- Central Park Digital Raster Quadrangle (Map). 1:24,000. New York State Department of Transportation. 1975. Retrieved December 28, 2009.
- Silver, Roy R. (March 20, 1966). "Nassau Villagers Fight Elevated Sunrise Highway". The New York Times. p. 57. Retrieved July 18, 2010.
- "The summer traffic cone program on County Road 39". Long Island Business News.
- "LIRR Adds Service On South Fork as Road Work on County Road 39 Begins". 1010 WINS. New York City. Associated Press. September 18, 2007.
- Greenburg, Peter (2009). Don't Go There!: The Travel Detective's Essential Guide to the Must-Miss Places of the World. New York: Rodale Inc. p. 190. ISBN 978-1-60529-994-5. Retrieved May 7, 2013.
- Bunch, William (March 7, 1986). "Another Delay for Sunrise Highway Work". Newsday. New York City. p. 25.
- Suffolk County Road Atlas (Map). Hagstrom Map. 1941. Retrieved April 28, 2010.
- Hagstrom's Atlas of Western Suffolk County, New York (1958, and other years)
- Google (February 1, 2011). "Oakdale Merge" (Map). Google Maps. Google. Retrieved February 1, 2011.
- Giorgianni, Anthony (December 31, 1981). "Oakdale Interchange Awaits Approval". Suffolk County News.
- Perry, N.W. (January 26, 2004). "Interchange of the Week – NY 27 & NY 27A, Oakdale". Empire State Roads. Retrieved April 9, 2012.
- Town of Brookhaven Zoning Map (Map). Town of Brookhaven, New York. August 21, 2000.
- Atlas of Suffolk County, New York (Map). Hagstrom Map. 1969.
- New York State Route 27 at Alps' Roads • New York Routes
- The traffic circle at the eastern terminus of NY 27 at Montauk Point
- NYC Roads article on NY 27
- NY 27 (Greater New York Roads)
- Oakdale Merge @ Empire State Roads.com
- NYCroads.com – Prospect Expressway (NY 27)
- NYSDOT – Gowanus Project