US Bridges

I-93 SB over I-93 NB Off Ramp

Good

Hillsborough County, New Hampshire · 1.5 MI E JCT Rt 28 · Structure no. 016101780012600

Built
1962
63 years old, rebuilt 2002
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
66 ft
1 main span
Daily traffic
26,271
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 SB over I-93 NB Off Ramp is a steel stringer/multi-beam or girder carrying I-93 SB over I-93 NB Off Ramp in Hillsborough County, New Hampshire. It was built in 1962 and reconstructed in 2002, so it is 63 years old, older 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 26,271 vehicles a day, roughly 11% of them trucks, projected to reach 38,881 by 2043. The structure is 66 ft (20.1 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-93 SB
CrossesI-93 NB Off Ramp
Location1.5 MI E JCT Rt 28
RouteInterstate 93
CountyHillsborough County
StateNew Hampshire
Coordinates42.96023, -71.40968
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 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 rating76.1 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length66 ft (20.1 m)
Longest span61 ft (18.6 m)
Deck width63 ft (19.2 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,271 (2023)
Projected traffic38,881 by 2043
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
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-93 SB over I-93 NB Off Ramp built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2002.

What condition is I-93 SB over I-93 NB Off 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 April 2023.

How much traffic does I-93 SB over I-93 NB Off Ramp carry?

About 26,271 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is I-93 SB over I-93 NB Off Ramp?

The structure is 66 ft (20.1 m) long with a longest span of 61 ft (18.6 m) and a deck 63 ft wide.

Who owns I-93 SB over I-93 NB Off Ramp?

It is owned by the State Highway Agency.