Norfolk County Bridge Report Card

Norfolk County scores 73 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

C73 / 100

Local infrastructure snapshot

Norfolk County, Massachusetts

Norfolk County has 343 bridges in the National Bridge Inventory, with 21 rated poor and 6 rated scour-critical. Its poor-condition share of 6.1% is at or below the 9.4% statewide average. Poor-condition bridges carry about 713,561 daily vehicle crossings.

343Total Bridges

21Poor (6.1%)

239Fair (69.7%)

6Scour-Critical

Quote-Ready Local Facts

6.1%of county bridges are in poor condition, compared with 9.4% statewide and 6.7% nationally.

713,561daily vehicle crossings are on poor-condition bridges in the county.

6bridges are rated scour-critical, or 1.7% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Norfolk County a Bridge Condition Exposure Score of 73/100 (C). The county has 343 bridges in the National Bridge Inventory, including 21 in poor condition and 6 rated scour-critical. Poor-condition bridges carry about 713,561 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.

Download all county report-card scores as CSV.

How the Score Breaks Down

Factor	Weight	County Value	Penalty
Poor-condition bridge share	40	6.1%	12.2
Poor-condition traffic exposure	25	6.3% of measured traffic	4.7
Scour-critical bridge share	20	1.7%	3.5
Average age vs national baseline	10	63 years vs 48 nationally	6.2
Traffic-data completeness	5	11,369,062 measured daily crossings	0.0

Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.

County Comparisons

County Poor-Condition Share	6.1%
State Poor-Condition Share	9.4%
National Poor-Condition Share	6.7%
County Scour-Critical Share	1.7%
Average Bridge Age	63 years
Poor-Condition Traffic Exposure	713,561 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeST 3 over HWY Union ST N Rotary — 204,310 vehicles/day Oldest Listed BridgeHWY Centre ST over Water Charles River — built in 1847 All County BridgesBrowse every bridge record in Norfolk County.

Top Bridges to Watch in Norfolk County

Bridge	Reason	Condition	Daily Traffic	Year Built
HWY Chestnut ST over Water Charles River	Poor condition + traffic exposure	Poor	10,100	1922
ST 3 over HWY Union ST N Rotary	Poor condition + traffic exposure	Poor	204,310	1957
I 93 Nb/us1sb over ST 24 NB	Poor condition + traffic exposure	Poor	101,100	1958
I 95 NB over HWY Central ST	Poor condition + traffic exposure	Poor	56,375	1963
I 495 SB over HWY Summer ST	Poor condition + traffic exposure	Poor	41,765	1966
ST 3 SB over I 93	Poor condition + traffic exposure	Poor	41,600	1957
I 495 NB over Rr Mbta/csx	Poor condition + traffic exposure	Poor	40,744	1966
I 95 SB over I 95 /us1/st128	Poor condition + traffic exposure	Poor	34,655	1966
ST 37 Washngton ST over Rr Mbta/csx	Poor condition + traffic exposure	Poor	29,095	1948
I 95 NB over I 95 /us1/st128	Poor condition + traffic exposure	Poor	27,543	1966

Important safety note

Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.