I 495 NB On Ramp over I 495 & Ramp D

Fair Condition26 years old4,963 vehicles/day

Location

StateMassachusetts
CountyMiddlesex
Location.5 Mi N Of Southboro T.l.
CarriesI 495 NB On Ramp
CrossesI 495 & Ramp D
Coordinates42.32049, -71.57091

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure7 (Good)
Substructure7 (Good)
Scour CriticalNot applicable

Physical Characteristics

MaterialSteel Continuous
DesignBox Beam - Single/Spread
Total Length577.1 ft (175.9 m)
Max Span159.1 ft (48.5 m)
Deck Width25.6 ft (7.8 m)
Deck Area1372.0 sq m
Main Spans4
Year Built2000

Traffic

Avg Daily Traffic4,963 (2022)
Truck Traffic6%
Lanes On Bridge1
Lanes Under Bridge7

Inspection & Ownership

Last Inspection623
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Structure NumberM06022AM2DOTNBI

Nearby Bridges

I 495 NB Off Ramp over I 495 & Ramp B 0.1 mi Fair I 495 NB over HWY Northboro RD 0.4 mi Fair I 495 SB over HWY Northboro RD 0.4 mi Fair I 495 SB over Comb Mdc Aqueduct & Csx 0.5 mi Fair I 495 NB over Comb Mdc Aqueduct & Csx 0.5 mi Fair HWY Northboro RD over Rr Csx 0.6 mi Good HWY Johnson RD over Water Brook 0.9 mi Good HWY Forest ST over I 495 0.9 mi Fair I 495 SB over ST 30 Main ST 1.0 mi Fair I 495 NB over ST 30 Main ST 1.0 mi Fair