US Bridges

HWY Mass Ave over Comb Amtrak/Mbta & Orng

Fair

Suffolk County, Massachusetts · Adj. to Mass Ave Station · Structure no. B1608786WMBTNBI

Built
1980
45 years old
Condition
Fair
inspected September 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
92 ft
2 main spans
Daily traffic
15,000
2000 count
Owner
State
Other State Agency

About this bridge

HWY Mass Ave over Comb Amtrak/Mbta & Orng is a steel continuous stringer/multi-beam or girder carrying HWY Mass Ave over Comb Amtrak/Mbta & Orng in Suffolk County, Massachusetts. It was built in 1980, so it is 45 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 15,000 vehicles a day, roughly 6% of them trucks, projected to reach 23,690 by 2031. The structure is 92 ft (27.9 m) long and 100 ft wide.

Location

Open in Google Maps
CarriesHWY Mass Ave
CrossesComb Amtrak/Mbta & Orng
LocationAdj. to Mass Ave Station
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.34159, -71.08315
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.9 US tons
Inventory rating42.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+1 approach)
Design loadHS 20
Structure length92 ft (27.9 m)
Longest span48 ft (14.6 m)
Deck width100 ft (30.5 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,000 (2000)
Projected traffic23,690 by 2031
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesThird level (interchange)
CrossesRailroad
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State Agency
Maintained byOther State Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$526,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Mass Ave over Comb Amtrak/Mbta & Orng built?

It was built in 1980, making it 45 years old in 2025.

What condition is HWY Mass Ave over Comb Amtrak/Mbta & Orng 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 September 2022.

How much traffic does HWY Mass Ave over Comb Amtrak/Mbta & Orng carry?

About 15,000 vehicles per day (2000 count), of which roughly 6% are trucks.

How long is HWY Mass Ave over Comb Amtrak/Mbta & Orng?

The structure is 92 ft (27.9 m) long with a longest span of 48 ft (14.6 m) and a deck 100 ft wide.

Who owns HWY Mass Ave over Comb Amtrak/Mbta & Orng?

It is owned by the Other State Agency.