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Bridge conditions in Somerset County, New Jersey

397 inventoried bridges · 34 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

34 of the 397 bridges the federal inventory lists in Somerset County are rated poor; the rest split 130 good and 233 fair.

34 of the 397 bridges in Somerset County, New Jersey, are rated in poor condition (8.6%) in the 2025 National Bridge Inventory, as of August 20, 2026.
130 bridges (32.7%) are rated good and 233 (58.7%) fair.
The median Somerset County bridge was built in 1968.
The busiest poor-rated bridge is I-78 Eastbound over I-78 Ramp "a" (built 1963), carrying about 60,048 vehicles a day.

Good 32.7% · Fair 58.7% · Poor 8.6% of 397 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Bridge	Built	Vehicles/day	Condition
I-78 Eastbound over I-78 Ramp "a"	1963	60,048	Poor
I-78 Westbound over US 202-206	1964	56,615	Poor
I-78 Westbound over Tributary of Dead River	1965	50,135	Poor
I-78 EB over US 202 & 206	1965	44,922	Poor
I-78 WB over Washing Valley RD(CR620)	1965	42,420	Poor
I-287 SB over US 22 Wb+i-287 Ramp "nc"	1960	42,223	Poor
US 202 & 206 S.B. over US 22	1948	41,132	Poor
I-287 Northbound over US 202-206	1965	40,484	Poor
I-78 WB over I-287 SB & Ramp G	1963	28,041	Poor
Route Nj 28 over Cuckles Brook	1962	25,789	Poor
Ramp G of I-78 over I-287 NB	1964	17,707	Poor
King George Road over I-78	1965	17,479	Poor
Amwell Rd(cr 514) over Delaware & Raritan Canal	1953	14,270	Poor
Main St. (rt 527) over Delaware & Raritan Canal	1920	14,000	Poor
Valley Rd (CR 512) over Passaic River	1930	11,396	Poor
North Maple Ave. over I-287 SB	1966	11,262	Poor
North Maple Ave. over I-287 NB	1966	11,042	Poor
Readington Rd over Trib. Chambers Brook	1930	8,509	Poor
Readington Road over Chambers Brook	1930	8,509	Poor
US 202 over N Branch Raritan River	1922	6,913	Poor
Hamilton Road over New York Brnch (csxt)	1918	6,429	Poor
Raider Blvd over Royce Brook	1981	4,599	Poor
Foothill Road over I-287	1963	4,264	Poor
Prince Rodgers Ave over I-287 NB	1963	4,160	Poor
Prince Rodgers Ave over I-287 Southbound	1963	4,160	Poor
Pottersville Road over Peapack Brook	1927	3,608	Poor
Picket Pl. (CR567) over So. Br. of Raritan River	1979	2,791	Poor
Davenport Street over Peters Brook	1905	1,983	Poor
New Brunswick Rd over Tributary to D&r Canal	1979	1,238	Poor
Camp Meeting Ave. over Trenton Line (CSX)	1889	1,000	Poor
Meadow Road over Chambers Brook	2023	781	Poor
Morton St. over Cuckels Brook	1900	520	Poor
Mountain View Road over Bedens Brook	1972	340	Poor
Robert Street over Raritan Canal	1931	100	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
Route I-287 over Canal Rd D&r Raritan&rr	1960	159,760	Fair
I-287 over NJT (Raritan Valley)	1960	148,249	Fair
I-287 over Main St (CR 533)	1960	138,097	Fair
I-287 over Sky Brook	1959	122,240	Fair
Route I-287 S.B. over Elizabeth Ave (CR 621)	1961	120,175	Fair
I-78 over Corys Brook	1965	105,645	Fair
I-287 NB over Rt 22 Eastbound	1960	104,530	Fair
US 202/206 NB over US 22	1987	100,160	Fair
US 202 over US 206 SB & Nj 28	1994	100,054	Fair
US 202 & 206 over Peters Brook	1929	99,960	Fair

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

All of New Jersey: New Jersey bridge conditions by county · every download on the data page.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.