US Bridges

US 1 SB Ramp over HWY Orange ST

Good

Suffolk County, Massachusetts · .8 MI N of Tobin Br. · Structure no. C090113A9DOTNBI

Built
1956
69 years old, rebuilt 2022
Condition
Good
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
475 ft
7 main spans
Daily traffic
9,143
2021 count
Owner
State
State Highway Agency

About this bridge

US 1 SB Ramp over HWY Orange ST is a steel stringer/multi-beam or girder carrying US 1 SB Ramp over HWY Orange ST in Suffolk County, Massachusetts. It was built in 1956 and reconstructed in 2022, so it is 69 years old, older than the Massachusetts average of 63.8 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 9,143 vehicles a day, roughly 6% of them trucks, projected to reach 23,216 by 2032. The structure is 475 ft (144.8 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 1 SB Ramp
CrossesHWY Orange ST
Location.8 MI N of Tobin Br.
RouteU.S. Route 1
Coordinates42.40188, -71.03772
Functional classUrban Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating91.9 US tons
Inventory rating55.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length475 ft (144.8 m)
Longest span70 ft (21.3 m)
Deck width26 ft (7.9 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,143 (2021)
Projected traffic23,216 by 2032
Trucks6%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 1 SB Ramp over HWY Orange ST built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 2022.

What condition is US 1 SB Ramp over HWY Orange ST 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 January 2023.

How much traffic does US 1 SB Ramp over HWY Orange ST carry?

About 9,143 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is US 1 SB Ramp over HWY Orange ST?

The structure is 475 ft (144.8 m) long with a longest span of 70 ft (21.3 m) and a deck 26 ft wide.

Who owns US 1 SB Ramp over HWY Orange ST?

It is owned by the State Highway Agency.