Montgomery County Bridge Report Card

Montgomery County scores 85 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B85 / 100

Local infrastructure snapshot

Montgomery County, Maryland

Montgomery County has 516 bridges in the National Bridge Inventory, with 25 rated poor and 9 rated scour-critical. Its poor-condition share of 4.8% is above the 4.6% statewide average. Poor-condition bridges carry about 275,822 daily vehicle crossings.

516Total Bridges

25Poor (4.8%)

291Fair (56.4%)

9Scour-Critical

Quote-Ready Local Facts

4.8%of county bridges are in poor condition, compared with 4.6% statewide and 6.7% nationally.

275,822daily vehicle crossings are on poor-condition bridges in the county.

9bridges are rated scour-critical, or 1.7% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Montgomery County a Bridge Condition Exposure Score of 85/100 (B). The county has 516 bridges in the National Bridge Inventory, including 25 in poor condition and 9 rated scour-critical. Poor-condition bridges carry about 275,822 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	4.8%	9.7
Poor-condition traffic exposure	25	2.0% of measured traffic	1.5
Scour-critical bridge share	20	1.7%	3.5
Average age vs national baseline	10	48 years vs 48 nationally	0.0
Traffic-data completeness	5	13,873,131 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	4.8%
State Poor-Condition Share	4.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	1.7%
Average Bridge Age	48 years
Poor-Condition Traffic Exposure	275,822 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeClara Barton Parkw over Clara Barton Parkway (sb — 40,057 vehicles/day Oldest Listed BridgeMacarthur Blvd. over Cabin John Creek — built in 1863 All County BridgesBrowse every bridge record in Montgomery County.

Top Bridges to Watch in Montgomery County

Bridge	Reason	Condition	Daily Traffic	Year Built
Barnes Road over Bennett Creek	Poor condition + traffic exposure	Poor	608	1925
Schaeffer Road over Little Seneca Creek	Poor condition + traffic exposure	Poor	437	1925
Clara Barton Parkw over Clara Barton Parkway (sb	Poor condition + traffic exposure	Poor	40,057	1959
Father Hurley Boul over Little Seneca Creek Trib	Poor condition + traffic exposure	Poor	33,220	1995
West Gude Drive over I-270	Poor condition + traffic exposure	Poor	30,343	1985
Tuckerman Lane over Snakeden Branch	Poor condition + traffic exposure	Poor	19,882	1966
Shady Grove RD EB over Csxt Railroad	Poor condition + traffic exposure	Poor	19,679	1976
Seven Locks Road over Cabin John Creek Tributa	Poor condition + traffic exposure	Poor	18,184	1965
Midcounty HWY & Mi over Mill Creek	Poor condition + traffic exposure	Poor	17,842	1984
Southlawn Lane over Rock Creek	Poor condition + traffic exposure	Poor	16,792	1920

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.