County Route 531 (New Jersey)

County Route 531 (CR 531) is a county highway in the U.S. state of New Jersey. The highway extends 13.61 miles (21.90 km) from Woodbridge Avenue (CR 514) in Edison, Middlesex County, through Somerset County to Passaic Valley Road (CR 512) in Long Hill Township, Morris County.

County Route 531 marker

County Route 531

CR 531 highlighted in red
Route information
Length13.61 mi[1] (21.90 km)
ExistedJanuary 1, 1953[2]–present
Major junctions
South end CR 514 in Edison
Major intersections
North end CR 512 in Long Hill Township
Location
CountryUnited States
StateNew Jersey
CountiesMiddlesex, Union, Somerset, Morris
Highway system
← CR 530→ CR 532

Route description
View northbound along CR 531 from the Northeast Corridor in Metuchen

CR 531 begins at CR 514 in Edison. It heads north, soon passing under New Jersey Turnpike/Interstate 95 (I-95) without an interchange. It has a partial cloverleaf interchange with U.S. Route 1 (US 1) before crossing over I-287. One ramp from southbound I-287's exit 1B provides access to CR 531 south. CR 531 continues north through a residential neighborhood. Known as Main Street, it proceeds northward into the borough of Metuchen. It has an intersection with CR 501 while passing through downtown Metuchen. It travels under Amtrak's Northeast Corridor at the Metuchen station serving NJ Transit's Northeast Corridor Line while it later intersects New Jersey Route 27. CR 531 makes a short jog to the west where it becomes known as Plainfield Avenue, then turns to the north passing St. Joseph High School. It then turns west on to Park Avenue before turning to the north again.[3]

View north along CR 531 (Park Avenue) at Plainfield Road in Edison

It continues north through Edison and South Plainfield. The route passes near Putnam Park and intersects CR 602 (also the terminus of unsigned CR 509). It crosses into Plainfield, Union County traveling near Cedar Brook Park and Plainfield High School. County maintenance of the road ends at 9th Avenue in Plainfield while the city-maintained CR 531 continues northeast through downtown Plainfield along Park Avenue. In the center of the city's business district, it intersects Route 28 and provides access to Plainfield station serving NJ Transit's Raritan Valley Line. Upon crossing Green Brook into North Plainfield, Somerset County, county maintenance of the route resumes and the road name becomes Somerset Street. The mainline of CR 531 jogs to the east for one block at Pearl Street before turning northwest onto Watchung Avenue.[1] However, Somerset Street is a borough-maintained alternate route of CR 531 which travels through the central business district of North Plainfield.[4][5]

The two legs of CR 531 eventually reach US 22. Watchung Avenue and Somerset Street provide right-in/right-out access to both sides of US 22, however for through traffic along CR 531, an overpass located between the two legs of the route is used to cross US 22. Heading northwest, the two legs of CR 531 come together and the road heads through a water gap formed by Stony Brook through the First Watchung Mountain towards Watchung. In the center of the borough, CR 531 and CR 527 intersect at the Watchung Circle. CR 531 and CR 527 share a brief concurrency along Valley Road to the northeast of the circle before breaking off onto Hillcrest Road. This road heads north into Warren Township where it has an interchange with I-78 at its exit 40. The road reaching its northern terminus at CR 512 in Long Hill Township, Morris County within the community of Gillette.[3]

Major intersections
CountyLocationmi[1]kmDestinationsNotes
MiddlesexEdison0.000.00

 CR 514 (Woodbridge Avenue) to US 1 / Route 440 – Middlesex College		Southern terminus
0.691.11

 US 1 to I-287 / N.J. Turnpike		Interchange
0.861.38 I-287Ramp from southbound I-287, exit 1 (I-287)
Metuchen1.552.49 CR 501 (Amboy Avenue)
1.993.20
 Route 27 (Middlesex Avenue) to G.S. Parkway – New Brunswick, Newark
South Plainfield6.4110.32 CR 602 (Maple Avenue / CR 509 north)Southern terminus of unsigned CR 509 segment
UnionPlainfield8.41–
8.48		13.53–
13.65		 Route 28 (4th Street/5th Street)
SomersetNorth Plainfield9.7815.74 US 22 – Newark, SomervilleInterchange
Watchung10.8217.41
 CR 527 south (Mountain Boulevard) / CR 653 (Stirling Road) – Warren Township, Stirling		South end of CR 527 overlap; Watchung Circle
10.9017.54
 CR 527 north (Valley Road) – Summit		North end of CR 527 overlap
Warren Township11.8819.12
 I-78 to N.J. Turnpike – Clinton, Newark		Exit 40 (I-78)
MorrisLong Hill Township13.6121.90
 CR 512 (Valley Road) / CR 638 north (Mountain Avenue)		Northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

References
  1. "County Route 531 Straight Line Diagram" (PDF). NJDOT. March 2019. Retrieved January 22, 2022.
  2. "State Ready to Push Traffic Off Major Roads in Air Raid". The Sunday Times. New Brunswick, New Jersey. March 15, 1953. pp. 1, 39. Retrieved January 17, 2021 – via Newspapers.com. open access
  3. Google (January 22, 2022). "County Route 531 (New Jersey)" (Map). Google Maps. Google. Retrieved January 22, 2022.
  4. "County Route 531Z Straight Line Diagram" (PDF). NJDOT. March 2019. Retrieved January 22, 2022.
  5. Google (January 22, 2022). "CR 531Z" (Map). Google Maps. Google. Retrieved January 22, 2022.
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