US Bridges

I 93 Ramp Sa-Cn over HWY Access RD

Good

Suffolk County, Massachusetts · I93/US1 Interchange · Structure no. B166039PGDOTNBI

Built
2003
22 years old
Condition
Good
inspected December 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
245 ft
2 main spans
Daily traffic
29,700
2023 count
Owner
State
State Highway Agency

About this bridge

I 93 Ramp Sa-Cn over HWY Access RD is a prestressed concrete continuous box beam or girders - single or spread carrying I 93 Ramp Sa-Cn over HWY Access RD in Suffolk County, Massachusetts. It was built in 2003, so it is 22 years old, younger 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 29,700 vehicles a day, roughly 4% of them trucks, projected to reach 23,690 by 2032. The structure is 245 ft (74.7 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 93 Ramp Sa-Cn
CrossesHWY Access RD
LocationI93/US1 Interchange
RouteInterstate 93
CountySuffolk County
StateMassachusetts
Coordinates42.36785, -71.06176
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 inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.6 US tons
Inventory rating64.3 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length245 ft (74.7 m)
Longest span140 ft (42.7 m)
Deck width35 ft (10.7 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deck0 ft (0 m)

Traffic and service

Average daily traffic29,700 (2023)
Projected traffic23,690 by 2032
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$14.6 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 Ramp Sa-Cn over HWY Access RD built?

It was built in 2003, making it 22 years old in 2025.

What condition is I 93 Ramp Sa-Cn over HWY Access RD 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 December 2023.

How much traffic does I 93 Ramp Sa-Cn over HWY Access RD carry?

About 29,700 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is I 93 Ramp Sa-Cn over HWY Access RD?

The structure is 245 ft (74.7 m) long with a longest span of 140 ft (42.7 m) and a deck 35 ft wide.

Who owns I 93 Ramp Sa-Cn over HWY Access RD?

It is owned by the State Highway Agency.