US Bridges

I 495 SB over RR Mbta/Bmrr

Good

Middlesex County, Massachusetts · 50 Ft S of Woburn ST Exit · Structure no. L15083BA1DOTNBI

Built
2011
14 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
88 ft
1 main span
Daily traffic
64,100
2019 count
Owner
State
State Highway Agency

About this bridge

I 495 SB over RR Mbta/Bmrr is a steel stringer/multi-beam or girder carrying I 495 SB over RR Mbta/Bmrr in Middlesex County, Massachusetts. It was built in 2011, so it is 14 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 64,100 vehicles a day, roughly 10% of them trucks, projected to reach 102,654 by 2032. The structure is 88 ft (26.8 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 495 SB
CrossesRR Mbta/Bmrr
Location50 Ft S of Woburn ST Exit
RouteInterstate 495
CountyMiddlesex County
StateMassachusetts
Coordinates42.61753, -71.29221
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionOctober 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 alignment7: Better than present minimum criteria
Operating rating78.6 US tons
Inventory rating47.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length88 ft (26.8 m)
Longest span78 ft (23.7 m)
Deck width64 ft (19.5 m)
Roadway width58 ft (17.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64,100 (2019)
Projected traffic102,654 by 2032
Trucks10%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$506,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 SB over RR Mbta/Bmrr built?

It was built in 2011, making it 14 years old in 2025.

What condition is I 495 SB over RR Mbta/Bmrr 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 October 2023.

How much traffic does I 495 SB over RR Mbta/Bmrr carry?

About 64,100 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is I 495 SB over RR Mbta/Bmrr?

The structure is 88 ft (26.8 m) long with a longest span of 78 ft (23.7 m) and a deck 64 ft wide.

Who owns I 495 SB over RR Mbta/Bmrr?

It is owned by the State Highway Agency.