US Bridges

ST126 N Main ST over RR Mbta/Csx

Fair

Norfolk County, Massachusetts · .2 Mi.N of ST 140 · Structure no. B060092AVDOT634

Built
1972
53 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
72 ft
1 main span
Daily traffic
17,916
2023 count
Owner
State
State Highway Agency

About this bridge

ST126 N Main ST over RR Mbta/Csx is a steel stringer/multi-beam or girder carrying ST126 N Main ST over RR Mbta/Csx in Norfolk County, Massachusetts. It was built in 1972, so it is 53 years old, younger than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 17,916 vehicles a day, roughly 8% of them trucks, projected to reach 25,269 by 2032. The structure is 72 ft (21.9 m) long and 59 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesST126 N Main ST
CrossesRR Mbta/Csx
Location.2 Mi.N of ST 140
RouteState Highway 126
CountyNorfolk County
StateMassachusetts
Coordinates42.09097, -71.47649
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating63.6 US tons
Inventory rating38.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length72 ft (21.9 m)
Longest span62 ft (18.9 m)
Deck width59 ft (18.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,916 (2023)
Projected traffic25,269 by 2032
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$778,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST126 N Main ST over RR Mbta/Csx built?

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

What condition is ST126 N Main ST over RR Mbta/Csx in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2025.

How much traffic does ST126 N Main ST over RR Mbta/Csx carry?

About 17,916 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is ST126 N Main ST over RR Mbta/Csx?

The structure is 72 ft (21.9 m) long with a longest span of 62 ft (18.9 m) and a deck 59 ft wide.

Who owns ST126 N Main ST over RR Mbta/Csx?

It is owned by the State Highway Agency.