Suffolk County, MA

494 public highway bridges

Suffolk County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Suffolk County, Massachusetts contains 494 public highway bridges. Roughly 22.7% are rated “Good,” 64.4% “Fair,” and 6.9% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

494
Total Bridges
22.7%
Good
64.4%
Fair
6.9%
Poor Condition

Condition Distribution

Good
22.7% (112)
Fair
64.4% (318)
Poor
6.9% (34)

All Bridges (494)

I 93 SB BT 46-57

Fair

Over: TR ORANGE LINE

.5 MI N OF JCT I93&US1, Suffolk, MA

Built 1970 Load: 32.7 t ADT: 87,100

I 93 NB B16-NB4

Fair

Over: I 93 SB&CMBRG&MBTA/BMRR

1.1 MI N OF JCT I93&US1, Suffolk, MA

Built 1970 Load: 32.8 t ADT: 76,000

ST 2 BROOKLINE ST

Fair

Over: COMB SOL FLD RD & RIV

CITY LINE BOS CAMB, Suffolk, MA

Built 1928 Load: 33.0 t ADT: 37,370

I 93 NB

Fair

Over: I 93 SB BT 46 - 57

.5 MI N OF JCT I93&US1, Suffolk, MA

Built 1970 Load: 33.0 t ADT: 72,888

I 93 SB BT 61-B5

Fair

Over: RR BMRR

0.24 MI S OF CAMBRIDGE ST, Suffolk, MA

Built 1970 Load: 33.0 t ADT: 87,100

HWY FAIRMONT AVE

Fair

Over: COMB WALNUT ST & MBTA

1 MI W OF SR138/NEP PKW., Suffolk, MA

Built 1908 Load: 33.3 t ADT: 18,103

HWY COMM AVE WB

Fair

Over: WATER MUDDY RIVER

.3 MI E OF KENMORE SQ., Suffolk, MA

Built 1917 Load: 33.3 t ADT: 9,800

I 93 SB B16-SB4

Fair

Over: COMB CAMBRIGE&MBTA/BMRR

1.2 MI N OF JCT I93&US1, Suffolk, MA

Built 1970 Load: 33.3 t ADT: 77,596

HWY CHELSEA ST

Fair

Over: WATER LITTLE MYSTIC CHAN

UNDER TOBIN AT MORAN TERM, Suffolk, MA

Built 1982 Load: 33.3 t ADT: 4,008

HWY UKRAINE WAY

Fair

Over: RR AMTRAK/MBTA

S OF FOREST HILLS STATION, Suffolk, MA

Built 1982 Load: 33.3 t ADT: 5,400

HWY SUMMER ST

Fair

Over: WATER RESERVE CHANNEL

1. 6 KM SE OF FT PT CHAN, Suffolk, MA

Built 1892 Load: 33.4 t ADT: 29,200

I 93 /US1/ST3

Fair

Over: WATER NEPONSET RIVER

.8 KM S OF JCT SR 3A, Suffolk, MA

Built 1954 Load: 33.6 t ADT: 169,936

ST 99 ALFORD ST

Fair

Over: WATER MYSTIC RIVER

AT MYSTIC RIVER, Suffolk, MA

Built 1963 Load: 33.7 t ADT: 40,000

HWY SOHAMPTN ST

Fair

Over: COMB AMTRAK & RED LINE

E OF SE XWAY, Suffolk, MA

Built 1902 Load: 33.7 t ADT: 33,800

I 93 BT NB4-N ABT

Fair

Over: I 93 CONN D & K

1.9 KM N OF JCT US1&I93, Suffolk, MA

Built 1970 Load: 33.7 t ADT: 65,702

HWY HERALD ST

Fair

Over: RR CSX SPUR

AT INK BLOCK, Suffolk, MA

Built 1957 Load: 33.8 t ADT: 32,500

I 93 NB

Fair

Over: I 93 SB BT 57 - 61

.5 MI N OF JCT I93&US1, Suffolk, MA

Built 1970 Load: 33.8 t ADT: 37,000

I 93 SB BT 57-61

Fair

Over: RR MBTA & BMRR

.5 MI N OF JCT 193&US1, Suffolk, MA

Built 1970 Load: 33.8 t ADT: 87,100

HWY PORTER ST

Fair

Over: OTHER PEDESTRIAN WLKWY

15.2 M S OF SR 1A, Suffolk, MA

Built 1907 Load: 33.9 t ADT: 7,500

HWY WASHNGTN AVE

Fair

Over: WATER PINES RIVER

0.5 KM W. OF JCT. US 1, Suffolk, MA

Built 1950 Load: 33.9 t ADT: 17,700

I 93 /US1/ST3

Fair

Over: COMB MBTA & COLUMBIA RD

2 MI S OF JCT I90, Suffolk, MA

Built 1958 Load: 34.0 t ADT: 205,100

US 1 RAMP LC

Fair

Over: COMB US1SB/NB&MILLERS R

RAMP FROM RUTHERFORD AVE, Suffolk, MA

Built 1989 Load: 34.2 t ADT: 18,620

HWY COMM AVE EB

Fair

Over: WATER MUDDY RIVER

.3 MI E OF KENMORE SQ., Suffolk, MA

Built 1917 Load: 34.3 t ADT: 22,600

HWY MOUNTAIN AVE

Fair

Over: US 1 NE XWAY

1.76 KM N OF JCT SR16, Suffolk, MA

Built 1957 Load: 34.3 t ADT: 5,300

HWY FRNT RD NB

Fair

Over: OTHER RELIEF

JUST NORTH SO BY PASS RD, Suffolk, MA

Built 2000 Load: 34.9 t ADT: 42,155

HWY CAMBRIDGE ST

Fair

Over: COMB ORANGE & MBTA/BMRR

0.33 KM W SULLIVAN SQ., Suffolk, MA

Built 1880 Load: 35.0 t ADT: 23,000

I 93 /US1/ST3

Fair

Over: COMB MBTA & RED LN SSH

6.8 KM S OF JCT I90&I93, Suffolk, MA

Built 1957 Load: 35.0 t ADT: 211,123

US 1 NE XWAY

Fair

Over: ST 60 EB/SQUIRE RD

1.6 KM W OF SR 107, Suffolk, MA

Built 1958 Load: 35.0 t ADT: 83,500

HWY BENNINGTN ST

Fair

Over: HWY MARTIN COUGHLIN BY

305 M S OF SUFFOLK DOWNS, Suffolk, MA

Built 1906 Load: 35.1 t ADT: 42,672

I 93 SB B10-B16RP

Fair

Over: RR MBTA & BMRR

.8 MI N OF JCT US1 & I93, Suffolk, MA

Built 1970 Load: 35.2 t ADT: 26,000

I 93 NB B10-B16

Fair

Over: I 93 SB B10-B16

1.0 MI N OF JCT I93 & US1, Suffolk, MA

Built 1970 Load: 35.2 t ADT: 58,882

HWY SUMMER ST

Fair

Over: HWY A ST

.16 KM SE FT PT CHANNEL, Suffolk, MA

Built 1918 Load: 35.6 t ADT: 12,931

HWY WESTERN AVE

Fair

Over: HWY SOLDIERS FIELD RD

.1 MI N OF BIRMINGHAM PKW, Suffolk, MA

Built 1968 Load: 35.6 t ADT: 26,900

ST 1 A

Fair

Over: HWY CHELSEA & BREMEN S

1000FT NE OF CALLHAN TUN., Suffolk, MA

Built 1951 Load: 35.7 t ADT: 56,250

HWY SAVIN HLL AV

Fair

Over: I 93 /US1/ST3

3.2 KM S OF JCT I93&90, Suffolk, MA

Built 1958 Load: 35.8 t ADT: 6,077

I 93 RAMP S-N

Fair

Over: OTHER RELIEF

RAMP STORROW DR. TO I93N, Suffolk, MA

Built 2005 Load: 36.3 t ADT: 8,800

HWY ADAMS ST

Fair

Over: TR RED LINE MATT CONN

.3 MI S. JCT SR, Suffolk, MA

Built 1886 Load: 36.5 t ADT: 21,000

US 1 NE XWAY

Fair

Over: HWY SARGENT ST

1 MI S OF ST-60, Suffolk, MA

Built 1956 Load: 36.6 t ADT: 83,793

HWY NORFOLK ST

Fair

Over: RR MBTA

.53 KM W OF JCTSR28&SR203, Suffolk, MA

Built 1901 Load: 36.7 t ADT: 13,400

ST 1 A

Fair

Over: HWY BNINGTN & NEPTUNE

1 MI N OF CALLAHAN TUN., Suffolk, MA

Built 1951 Load: 36.7 t ADT: 33,770

I 93 SB

Fair

Over: OTHER RELIEF

ALBANY ST / FRONTAGE RD, Suffolk, MA

Built 1997 Load: 36.7 t ADT: 45,270

ST107 SALEM TPK

Fair

Over: WATER PINES RIVER

1.4 KM NE OF RTE 60, Suffolk, MA

Built 2011 Load: 36.9 t ADT: 35,302

HWY FRNT RD NB

Fair

Over: OTHER RELIEF

MASS AVE. INT., Suffolk, MA

Built 2000 Load: 37.0 t ADT: 49,913

HWY CENTRAL AVE

Fair

Over: WATER NEPONSET RIVER

AT RIV & MILTON LINE, Suffolk, MA

Built 1973 Load: 37.1 t ADT: 13,488

I 93 /US1/ST3

Fair

Over: HWY CONLEY ST

6.6 KM S OF JCT I90&I93, Suffolk, MA

Built 1955 Load: 37.2 t ADT: 183,369

HWY ADAMS ST

Fair

Over: WATER NEPONSET RIVER

OVER NEPONSET RIV AT MILT, Suffolk, MA

Built 1765 Load: 37.3 t ADT: 31,000

ST 1 A

Fair

Over: HWY SARATGA ST & U TRN

1.7 KM N OF CALLAHAN TUN, Suffolk, MA

Built 1951 Load: 37.3 t ADT: 86,897

HWY LONGWOOD AVE

Fair

Over: WATER MUDDY RIVER

.8 KM N OF JCT SR9&JWAY, Suffolk, MA

Built 1897 Load: 37.4 t ADT: 26,121

I 93 /US1/ST3

Fair

Over: HWY NEP AV/GALV/MRSY

4.4 MI S OF JCT I90&I93, Suffolk, MA

Built 1955 Load: 37.5 t ADT: 158,879

ST 1 A/ON RAMP

Fair

Over: OTHER RELIEF

1.4 KM NE OF SUMNER TUN, Suffolk, MA

Built 1951 Load: 37.6 t ADT: 15,000

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.