Honolulu County Bridge Report Card
Honolulu County scores 65 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Honolulu County, Hawaii
Honolulu County has 674 bridges in the National Bridge Inventory, with 40 rated poor and 49 rated scour-critical. Its poor-condition share of 5.9% is above the 5.7% statewide average. Poor-condition bridges carry about 793,959 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Honolulu County a Bridge Condition Exposure Score of 65/100 (D). The county has 674 bridges in the National Bridge Inventory, including 40 in poor condition and 49 rated scour-critical. Poor-condition bridges carry about 793,959 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 5.9% | 11.9 |
| Poor-condition traffic exposure | 25 | 3.5% of measured traffic | 2.6 |
| Scour-critical bridge share | 20 | 7.3% | 14.5 |
| Average age vs national baseline | 10 | 62 years vs 48 nationally | 5.7 |
| Traffic-data completeness | 5 | 22,902,406 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 | 5.9% |
| State Poor-Condition Share | 5.7% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 7.3% |
| Average Bridge Age | 62 years |
| Poor-Condition Traffic Exposure | 793,959 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Honolulu County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Kamehameha HWY over Anahulu Strm | Poor condition + traffic exposure | Poor | 12,850 | 1921 |
| Kam HWY over N Punaluu Strm | Poor condition + traffic exposure | Poor | 11,100 | 1926 |
| Kalihi ST over Kalihi ST Br#3/kalihi ST | Poor condition + traffic exposure | Poor | 1,073 | 1942 |
| Auloa RD over Auloa Rd/maunawili Strm | Poor condition + traffic exposure | Poor | 900 | 1921 |
| Kam Hwy/keehi Ic over Kalihi Strm /ob | Poor condition + traffic exposure | Poor | 70,510 | 1943 |
| Halawa Ic Ramp G&h over Halawa Heights Stream | Poor condition + traffic exposure | Poor | 58,709 | 1971 |
| Kal HWY over Niu Strm | Poor condition + traffic exposure | Poor | 58,500 | 1934 |
| Nimitz HWY over Nuuanu Strm (w.b.) | Poor condition + traffic exposure | Poor | 57,600 | 1932 |
| Nimitz HWY over Kapalama Canal (e.b) | Poor condition + traffic exposure | Poor | 57,600 | 1949 |
| Nimitz HWY over Slip Cover #3 Hon Hbr | Poor condition + traffic exposure | Poor | 57,600 | 1952 |
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.