CR 514 begins at an intersection with
U.S. Route 202/
Route 31 in
East Amwell Township,
Hunterdon County, heading northeast on two-lane undivided
Old York Road. West of US 202/Route 31, Old York Road becomes
Route 179. A short distance after beginning, the road becomes the border between
Raritan Township to the northwest and East Anwell to the southeast, passing through a mix of farmland and homes. The route reaches the residential community of
Reaville, where CR 514 splits from Old York Road and heads northeast onto Amwell Road, with
CR 613 continuing along Old York Road. The road comes to the intersection of Manners Road (
CR 609) before running east through more areas of agriculture and housing developments. CR 514 continues east into
Hillsborough Township in
Somerset County, passing farms before continuing into more wooded areas with some agriculture and residences. The road enters woodland as it reaches an intersection of River Road (
CR 567) at
Neshanic. The route passes through more areas of farms and woods before heading into wooded areas of residential development and coming to the intersection of East Mountain Road (
CR 677). At this point, CR 514 runs through woodland before passing more residential subdivisions and widening to four lanes as it comes to the intersection of Marshall Road (
CR 625). The route passes north of
Hillsborough High School and curves to the northeast, passing to the northwest of a
park and ride lot before coming to the intersection of
U.S. Route 206. At this point, the roadway turns east again and narrows back to two lanes. The road passes housing developments to the north and fields to the south, coming to an interchange with
U.S. Route 206 Bypass prior to passing over
CSX's
Trenton Subdivision. The route continues through farms, woods, and homes before reaching the intersection of Schilke Lane (
CR 650), at which point CR 514 turns northeast and enters
Millstone. The road bypasses the residential neighborhoods of the borough to the north by passing through woodland and fields, turning east and intersects with Somerset Courthouse Road (
CR 533 Spur) and Main Street (
CR 533). The route crosses the
Millstone River into
Franklin Township and passes over the
Delaware & Raritan Canal in developed area known as
East Millstone. From this point, CR 514 continues through more farmland and woodland, intersecting with Elizabeth Avenue (
CR 621) before turning north and coming to the intersection of Cedar Grove Lane (
CR 619). At this point, the route turns east again and enters residential surroundings, intersecting with South Middlebush Road (
CR 615), where it turns east-southeast and widens to four lanes. The road becomes Hamilton Street at the intersection of JFK Boulevard and heads into the community of
Somerset. Here, the route begins to curve to the east-northeast as it comes to the intersection of Franklin Boulevard (
CR 617), narrowing back to two lanes. Following this intersection, the road passes through a mix of homes and businesses. Upon crossing Mile Run Stream, CR 514 enters
New Brunswick in
Middlesex County and becomes
unsigned and city maintained. CR 514 passes through more residential and commercial development as it comes to an intersection with Easton Avenue (
CR 527). CR 514 and Hamilton Street continue past off-campus residences of
Rutgers University and later pass through the
College Avenue Campus of the university. After passing the intersection of George Street (
CR 672), the road becomes Johnson Drive and passes through the office complex of the
Johnson & Johnson headquarters. The road curves to the south, passing under
Amtrak's
Northeast Corridor near the
New Brunswick station, and a ramp to
Route 18 south. At the intersection of (
Route 27), CR 514 joins Albany Street and forms a
concurrency with Route 27. After an interchange with Route 18, the road crosses the
Raritan River on the
Albany Street Bridge into
Highland Park. Upon entering Highland Park, Route 27/CR 514 becomes two-lane Raritan Avenue, intersecting with River Road
CR 622 and continuing through the downtown area of Highland Park. CR 514 splits from Route 27 by heading east on Woodbridge Avenue while Route 27 continues east-northeast on Raritan Avenue, where Middlesex County maintenance begins and signage resumes. Upon entering
Edison, Duclos Lane (
CR 676) intersects the route before it widens into a four-lane divided highway and interchanges with
U.S. Route 1. Following this, the road becomes two lanes and undivided again as it comes to the intersection of Plainfield Avenue (
CR 529) and passes through residential areas. CR 514 widens into a four-lane divided highway and passes over the
New Jersey Turnpike (
Interstate 95) before coming to an intersection of Mill Road (
CR 667). Past this intersection, the route turns northeast and passes
Middlesex College before running between residential areas to the northwest and commercial areas to the southeast. The road crosses
Conrail Shared Assets Operations' Bonhamtown Industrial Track line and intersects with Main Street (
CR 531), making a turn to the east. CR 514 turns northeast past more commercial development and intersects with Raritan Center Parkway before coming to an interchange complex that has access to the New Jersey Turnpike and
Route 440,
Interstate 287. Following this interchange, the route becomes undivided again and passes more businesses, crossing the intersection of Amboy Avenue (
CR 501). The road narrows to two lanes at this point and continues into residential areas as it enters
Woodbridge Township, where the name of the road becomes Main Street. CR 514 passes over both the New Jersey Turnpike and the
Garden State Parkway simultaneously before heading into business areas as a four-lane road and reaching an interchange with
U.S. Route 9. Here, the road becomes two lanes again and passes homes before heading into the commercial downtown of Woodbridge at the intersection of Amboy Avenue (
Route 35). CR 514 passes under
NJ Transit's
North Jersey Coast Line near the
Woodbridge Station prior to intersecting with Berry Street (
CR 652) and turning north onto Rahway Avenue. The road heads northeast through a mix of residences and businesses and intersects with Green Street (
CR 604. CR 604 joins the road for a short distance until it splits from CR 514 by heading northeast on Port Reading Avenue. The route crosses the Conrail Shared Assets Operations'
Port Reading Secondary line prior to intersecting with Avenel Street (
CR 650). Farther north, CR 514 crosses Conrail Shared Assets Operations' Supermarket Lead line and heads through industrial areas to the east of
East Jersey State Prison. CR 514 continues into
Rahway in
Union County, becoming Woodbridge Road and becomes Lawrence Street, intersecting with East Hazelwood Avenue (
CR 621) and passes a few homes before crossing the
Rahway River and intersects the southbound direction of
U.S. Route 1/9, with northbound US 1/9 passing over CR 514. From this point, the road continues past more residences, intersecting with East Milton Avenue (
CR 648). At the intersection of
CR 613, the route turns northwest onto East Grand Avenue and passes under the Northeast Corridor. CR 514 turns northeast onto Elizabeth Avenue, with CR 613 resuming along West Grand Avenue, and heads through residential and commercial areas a short distance to the northwest of the Northeast Corridor as it crosses CR 652. The route enters
Linden and heads past industry as it crosses an abandoned railroad branch. The road intersects CR 615 and passes businesses as it comes to CR 617. CR 514 passes more homes and commercial establishments, intersecting CR 619 and crossing under an abandoned railroad line. The road runs through more urban areas of businesses and industry as it reaches the Park Avenue (CR 616) junction. The road becomes municipally maintained over the Northeast Corridor before turning east onto county-maintained East Linden Avenue. CR 514 continues into
Elizabeth on Lidgerwood Avenue passing Elmora Avenue (
Route 439). Past Garden Street, the street becomes one-way in the westbound direction. The CR 514 designation ends at the intersection of Edgar Road and Washington Avenue. ==History==