Nassau County Bridge Report Card

Nassau County scores 84 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B84 / 100

Local infrastructure snapshot

Nassau County, New York

Nassau County has 328 bridges in the National Bridge Inventory, with 3 rated poor and 10 rated scour-critical. Its poor-condition share of 0.9% is at or below the 9.9% statewide average. Poor-condition bridges carry about 130,174 daily vehicle crossings.

328Total Bridges

3Poor (0.9%)

234Fair (71.3%)

10Scour-Critical

Quote-Ready Local Facts

0.9%of county bridges are in poor condition, compared with 9.9% statewide and 6.7% nationally.

130,174daily vehicle crossings are on poor-condition bridges in the county.

10bridges are rated scour-critical, or 3.0% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Nassau County a Bridge Condition Exposure Score of 84/100 (B). The county has 328 bridges in the National Bridge Inventory, including 3 in poor condition and 10 rated scour-critical. Poor-condition bridges carry about 130,174 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	0.9%	1.8
Poor-condition traffic exposure	25	1.1% of measured traffic	0.8
Scour-critical bridge share	20	3.0%	6.1
Average age vs national baseline	10	67 years vs 48 nationally	7.6
Traffic-data completeness	5	12,268,999 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	0.9%
State Poor-Condition Share	9.9%
National Poor-Condition Share	6.7%
County Scour-Critical Share	3.0%
Average Bridge Age	67 years
Poor-Condition Traffic Exposure	130,174 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeRTE 908g over RTE I495 — 129,086 vehicles/day Oldest Listed BridgeBridge Road over Long Island-pt Ws — built in 1898 All County BridgesBrowse every bridge record in Nassau County.

Top Bridges to Watch in Nassau County

Bridge	Reason	Condition	Daily Traffic	Year Built
RTE 908g over RTE I495	Poor condition + traffic exposure	Poor	129,086	1968
Bridge Road over Long Island-pt Ws	Poor condition + traffic exposure	Poor	1,088	1898
Seawane Drive over Auerbach Channel	Poor condition	Poor	0	1932
RTE 908c over Reynolds Channel	Scour-critical foundation rating	Fair	25,774	1934
Daly Boulevard over Simonsons Channel	Scour-critical foundation rating	Fair	22,162	1961
Atlantic Bch Br over Reynolds Channel Roadwa	Scour-critical foundation rating	Fair	18,147	1952
Branch Boulevard over Mott Creek	Scour-critical foundation rating	Fair	9,430	1960
Long Beach RD over Reynolds Channel	Scour-critical foundation rating	Fair	5,026	1953
Long Beach RD over Reynolds Channel	Scour-critical foundation rating	Fair	5,026	1953
Warwick BLVD over Island Park Canal	Scour-critical foundation rating	Fair	2,352	1989

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.