US Bridges

I-95 SB over NB Ramp

Good

Rockingham County, New Hampshire · SP Tpk I-95 Interchange · Structure no. 021701840012400

Built
1972
53 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
127 ft
1 main span
Daily traffic
30,667
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-95 SB over NB Ramp is a steel stringer/multi-beam or girder carrying I-95 SB over NB Ramp in Rockingham County, New Hampshire. It was built in 1972, so it is 53 years old, younger than the New Hampshire average of 56.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 30,667 vehicles a day, roughly 6% of them trucks, projected to reach 45,387 by 2043. The structure is 127 ft (38.7 m) long and 63 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI-95 SB
CrossesNB Ramp
LocationSP Tpk I-95 Interchange
RouteInterstate 95
CountyRockingham County
StateNew Hampshire
Coordinates43.07077, -70.78742
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.5 US tons
Inventory rating33.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length127 ft (38.7 m)
Longest span125 ft (38.1 m)
Deck width63 ft (19.2 m)
Roadway width58 ft (17.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,667 (2023)
Projected traffic45,387 by 2043
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$314,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-95 SB over NB Ramp built?

It was built in 1972, making it 53 years old in 2025.

What condition is I-95 SB over NB Ramp in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does I-95 SB over NB Ramp carry?

About 30,667 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I-95 SB over NB Ramp?

The structure is 127 ft (38.7 m) long with a longest span of 125 ft (38.1 m) and a deck 63 ft wide.

Who owns I-95 SB over NB Ramp?

It is owned by the State Toll Authority.