Harris County Bridge Report Card

Harris County scores 95 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

A95 / 100

Local infrastructure snapshot

Harris County, Texas

Harris County has 4,040 bridges in the National Bridge Inventory, with 24 rated poor and 63 rated scour-critical. Its poor-condition share of 0.6% is at or below the 1.2% statewide average. Poor-condition bridges carry about 435,704 daily vehicle crossings.

4,040Total Bridges

24Poor (0.6%)

2,005Fair (49.6%)

63Scour-Critical

Quote-Ready Local Facts

0.6%of county bridges are in poor condition, compared with 1.2% statewide and 6.7% nationally.

435,704daily vehicle crossings are on poor-condition bridges in the county.

63bridges are rated scour-critical, or 1.6% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Harris County a Bridge Condition Exposure Score of 95/100 (A). The county has 4,040 bridges in the National Bridge Inventory, including 24 in poor condition and 63 rated scour-critical. Poor-condition bridges carry about 435,704 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	0.6%	1.2
Poor-condition traffic exposure	25	0.4% of measured traffic	0.3
Scour-critical bridge share	20	1.6%	3.1
Average age vs national baseline	10	36 years vs 48 nationally	0.0
Traffic-data completeness	5	117,415,567 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	0.6%
State Poor-Condition Share	1.2%
National Poor-Condition Share	6.7%
County Scour-Critical Share	1.6%
Average Bridge Age	36 years
Poor-Condition Traffic Exposure	435,704 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeIH 45 SB over Crosstimbers ST — 109,570 vehicles/day Oldest Listed BridgeFranklin ST over Buffalo Bayou — built in 1914 All County BridgesBrowse every bridge record in Harris County.

Top Bridges to Watch in Harris County

Bridge	Reason	Condition	Daily Traffic	Year Built
US 90a SB over Buffalo Bayou/ Zoltowski	Poor condition + traffic exposure	Poor	25,730	1956
Broadway Boulevard over Brays Bayou	Poor condition + traffic exposure	Poor	18,564	1962
Laura Koppe RD over Ditch	Poor condition + traffic exposure	Poor	1,235	1997
Carolwood over Kennedy Gully	Poor condition + traffic exposure	Poor	901	1997
IH 45 SB over Crosstimbers ST	Poor condition + traffic exposure	Poor	109,570	1960
IH 45 NB over Crosstimbers ST	Poor condition + traffic exposure	Poor	96,046	1960
S Braeswood BLVD over Hcfcd Ditch	Poor condition + traffic exposure	Poor	44,730	1970
US 59 Nb/ih 610 WB over IH 610	Poor condition + traffic exposure	Poor	21,541	1979
IH 45 SB / Bw 8 WB over IH 45 Sbfr & Bw 8 Wbfr	Poor condition + traffic exposure	Poor	18,977	1997
SH 146 NB over Taylor Bayou	Poor condition + traffic exposure	Poor	18,841	1969

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.