Suffolk County, MA

494 public highway bridges

Suffolk County Bridge Snapshot

Suffolk County, Massachusetts contains 494 public highway bridges in the FHWA National Bridge Inventory. Roughly 22.7% are rated “Good,” 64.4% “Fair,” 6.9% “Poor,” and 6.9% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in MA are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

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

494
Total Bridges
22.7%
Good
6.9%
Poor
6.9%
Structurally Deficient

Condition Distribution

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

All Bridges (494)

I 93 RAMPS NS SN

Fair

Over: OTHER RELIEF

I93 RAMPS N-S S-N, Suffolk, MA

Built 1999 Load: 46.3 t ADT: 20,161

HWY S BOS BYPASS

Fair

Over: HWY WYDETT CIR ACC RD

0.6 M S OF JCT I 90, I 93, Suffolk, MA

Built 1995 Load: 46.3 t ADT: 12,300

I 93 SB

Fair

Over: HWY TRAVELER ST & PARK

UNIT 2, Suffolk, MA

Built 2000 Load: 46.4 t ADT: 148,110

I 93 SB

Fair

Over: COMB MILLERS RIVER/ OTH

I93/US 1 INTERCHANGE, Suffolk, MA

Built 2002 Load: 46.8 t ADT: 80,170

HWY RICHMOND ST

Fair

Over: ST 1 A/NB

AT WEST END CAL TNL, Suffolk, MA

Built 1961 Load: 46.9 t ADT: 775

ST 2 A/MASS AVE

Fair

Over: COMB STRW DR & CHAS RIV

.8 MI E OF BU BRIDGE, Suffolk, MA

Built 1891 Load: 47.0 t ADT: 38,638

ST 1 A/RP E-1AS

Fair

Over: ST 1 A/& RP E-1ANB

SEGMENT 1, Suffolk, MA

Built 2003 Load: 47.1 t

HWY SARATOGA ST

Fair

Over: TR BLUE LINE

OVER BLUE LINE, Suffolk, MA

Built 1913 Load: 47.2 t ADT: 34,400

I 93 RAMP K

Fair

Over: HWY W FOURTH ST

0.5 M S. OF I90, Suffolk, MA

Built 2002 Load: 47.2 t ADT: 11,717

I 93 RAMP X

Fair

Over: OTHER RELIEF

I93/I90 INTERCHANGE, Suffolk, MA

Built 2004 Load: 47.4 t ADT: 1,221

I 93 NB

Fair

Over: I 93 SB

I93/US1 INTERCHANGE, Suffolk, MA

Built 2003 Load: 47.5 t ADT: 70,395

I 93 RAMP SA-CN

Fair

Over: I 93 RAMPS

NORTH BANK CHARLES RIVER, Suffolk, MA

Built 2004 Load: 47.5 t ADT: 20,359

I 93 RAMP NS

Fair

Over: US 1 RAMP TC & LC

I93/US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 47.5 t ADT: 20,547

HWY RAMP 1A/D

Fair

Over: HWY RAMP 1A-A

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 47.7 t ADT: 10,600

HWY ACCESS RD

Fair

Over: WATER MILL CREEK

IN CHELSEA, Suffolk, MA

Built 1993 Load: 47.7 t ADT: 4,000

HWY W BROADWAY

Fair

Over: COMB HAUL RD & MBTA RED

1.1 KM SW OF D ST, Suffolk, MA

Built 1918 Load: 47.8 t ADT: 18,103

I 93 RAMP NS

Fair

Over: RR MBTA

I93 US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 47.8 t ADT: 31,000

US 1 RAMP TC

Fair

Over: COMB I93 RMP NS & MBTA

I93/US1 INTERCHANGE, Suffolk, MA

Built 2002 Load: 47.9 t ADT: 51,207

I 93 RAMP MW

Fair

Over: COMB I90&RMP LL KK&AMTK

.5 M N OF I90, Suffolk, MA

Built 2002 Load: 48.0 t ADT: 2,521

US 1 RAMP CT

Fair

Over: OTHER RELIEF

US1 RAMP C-T, Suffolk, MA

Built 2001 Load: 48.1 t ADT: 46,604

I 93 SB

Fair

Over: COMB RAMP LT& MILLERS R

I93/US INTERCHANGE, Suffolk, MA

Built 2002 Load: 48.6 t ADT: 97,000

I 93 RAMP K

Fair

Over: HWY RAMP MW & HOV EB

0.5 MI S. OF I-90, Suffolk, MA

Built 2002 Load: 49.0 t ADT: 11,583

I 93 HOV RAMP EB

Fair

Over: RR AMTRAK

0.8 KM S. OF I-90 EB, Suffolk, MA

Built 2002 Load: 49.0 t ADT: 2,316

I 93 RAMP KK

Fair

Over: HWY HOV RAMP EB

0.5 MI S. OF I-90, Suffolk, MA

Built 2002 Load: 49.0 t ADT: 16,461

US 1 NE XWAY

Fair

Over: RR MBTA & SILVER LINE

1 M NE OF TOBIN BR., Suffolk, MA

Built 1957 Load: 49.2 t ADT: 83,976

US 1 CUTLER HWY

Fair

Over: COMB TRAIL & LINDEN CRK

.64 KM N OF ST-60, Suffolk, MA

Built 1937 Load: 49.2 t ADT: 114,000

HWY RAMP T-A/D

Fair

Over: HWY RELIEF

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 49.5 t ADT: 14,400

ST 28 CHAS R DM RD

Fair

Over: WATER CHARLES RIVER

.1 MI NW OF NASHUA ST, Suffolk, MA

Built 1910 Load: 49.7 t ADT: 28,500

I 93 SB

Fair

Over: COMB I90 & AMTRAK

UNIT 4, Suffolk, MA

Built 2000 Load: 49.7 t ADT: 116,881

I 93 RAMP NS

Fair

Over: RR MBTA

I93/US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 49.9 t ADT: 19,352

I 93 NB RAMP C-L

Fair

Over: OTHER RELIEF

RAMP N. OF GILMORE BRIDGE, Suffolk, MA

Built 1999 Load: 50.0 t ADT: 17,800

I 93 NB RAMP CL

Fair

Over: OTHER RELIEF

RAMP N. OF GILMORE BRIDGE, Suffolk, MA

Built 1999 Load: 50.0 t ADT: 17,800

ST 1 A/VFW PKWY

Fair

Over: RR MBTA/BMRR

.32 KM N JCT SR1A&145, Suffolk, MA

Built 1932 Load: 50.0 t ADT: 47,457

HWY SEAPORT BLVD

Fair

Over: WATER FORT POINT CHANNEL

0.1MI EAST ATLANTIC AVE., Suffolk, MA

Built 1996 Load: 50.2 t ADT: 22,000

I 93 RAMPS SN NS

Fair

Over: RR MBTA

I93 US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 50.2 t ADT: 19,805

HWY S BOS BPS RD

Fair

Over: OTHER RELIEF

AT NB FRONTAGE RD., Suffolk, MA

Built 1998 Load: 50.2 t ADT: 16,600

HWY SUMNER ST

Fair

Over: OTHER PEDESTRIAN WLKWY

E. OF BREMEN/SUMNER INT., Suffolk, MA

Built 1908 Load: 50.3 t ADT: 7,241

HWY RAMP 1A-D

Fair

Over: HWY ARRIVAL ROADWAY

1.2 K SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 50.4 t ADT: 10,600

HWY MEDWAY ST

Fair

Over: TR RED HSL

0.1 MI S OF ADAMS ST, Suffolk, MA

Built 1928 Load: 50.7 t ADT: 800

I 93 RAMP E-SS

Fair

Over: I 93 RAMP C

0.25 MI E OF I-93, Suffolk, MA

Built 2002 Load: 50.8 t ADT: 517

ST 3 A/HNCK OFFRP

Fair

Over: OTHER RELIEF

.2 MI E OF I 93, Suffolk, MA

Built 1970 Load: 50.9 t ADT: 21,200

ST 3 A/HANCK ONRP

Fair

Over: OTHER RELIEF

.2 MI E OF I 93, Suffolk, MA

Built 1970 Load: 50.9 t ADT: 16,500

I 93 RAMP K

Fair

Over: I 90 & I 93 RAMP KK

I-90/I-93 INTERCHANGE, Suffolk, MA

Built 2006 Load: 50.9 t ADT: 9,310

US 1 RAMP CT

Fair

Over: COMB I93 SB &RMPS& MBTA

I93/US1 INTERCHANGE, Suffolk, MA

Built 2001 Load: 51.5 t ADT: 26,663

HWY JAMAICAWAY

Fair

Over: ST 9 HUNTNGTON AVE

JCT US 1 & ST 9, Suffolk, MA

Built 1936 Load: 52.1 t ADT: 42,700

I 93 RAMP KK

Fair

Over: COMB I90&RMP LL KK&AMTK

.5 MI N OF I90, Suffolk, MA

Built 2003 Load: 52.2 t ADT: 980

I 90 RAMP B & D

Fair

Over: HWY SERVICE ROAD

EXIT 22 NEAR TOP RP SPLIT, Suffolk, MA

Built 1981 Load: 52.5 t ADT: 16,034

I 93 NB RAMP CL

Fair

Over: OTHER RELIEF

RAMP N. OF GILMORE BRIDGE, Suffolk, MA

Built 1999 Load: 53.0 t ADT: 17,800

I 93 RAMPS SN NS

Fair

Over: RR BMRR BSG SPUR

I93/US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 53.2 t ADT: 37,301

I 93 HOV RAMP EB

Fair

Over: I 93 RAMP XX

0.8 KM S. OF I-90, Suffolk, MA

Built 2002 Load: 53.7 t ADT: 6,100

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

Related

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial