County profile · official public datasets

Honolulu County, HI

682 public highway bridges tracked in the FHWA National Bridge Inventory: 35.8% rated Good, 57.3% Fair, 6.9% Poor.

682
Public bridges: 35.8%
Good condition: 6.9%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Honolulu County posts a higher-than-median Poor-condition share among rated counties in the state across large county bridge inventory.

3rd
of 4 on Poor share: 6.9%
Poor-condition share: 682
public highway bridges: 1963
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Honolulu County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Honolulu County ranks #3 of 4 Hawaii counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.9%). Honolulu County, Hawaii contains 682 public highway bridges. Roughly 35.8% are rated “Good,” 57.3% “Fair,” and 6.9% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

Total bridges

682

Public highway bridges in Honolulu County

Good condition

35.8%

244 of 682 rated 7-9

Fair condition

57.3%

391 of 682 rated 5-6

Poor condition

6.9%

47 of 682 rated 4 or below

In-state Poor-share rank

#3 of 4

Among Hawaii counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 682 NBI-tracked bridges by lowest applicable component rating.

Good

35.8% (244)

Fair

57.3% (391)

Poor

6.9% (47)

Honolulu County's Poor-condition bridges carry 812,568 vehicle crossings a day

That is 3.6% of the county's reported daily bridge traffic on 6.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 17,289 crossings a day against 39,258 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 679 of 682 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

75.2% of Honolulu County's bridges have passed the 50-year mark

513 of the 682 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 35.8% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 13.6% of the county's Poor-condition bridge traffic

FAL-H1(N LEG VIA) over FAI-H1(N LEG VIA), built 1975, carries 110,500 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 47-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 812,568 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1900s

3
1910s

2
1920s

41
1930s

72
1940s

42
1950s

78
1960s

182
1970s

138
1980s

57
1990s

41
2000s

15
2010s

8
2020s

3

What this shows Construction peaked in the 1960s, when 182 of the county's bridges still in the inventory were built, which is 26.7% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1963) matches the Hawaii average (1961).

How Honolulu County compares with Hawaii's closest counties by inventory size

The 3 Hawaii counties nearest Honolulu County in number of bridges, with their condition splits. Its 6.9% Poor share is the 3rd-lowest of these 4. Its average build year of 1963 against a peer-group mean of 1958 is 5 years newer.

Bridge inventory size and condition shares for Honolulu County and the 3 Hawaii counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Honolulu County (this page)	682	35.8%	57.3%	6.9%	1963
Hawaii County	237	44.7%	51.1%	4.2%	1956
Maui County	185	33.5%	60.5%	5.9%	1958
Kauai County	90	36.7%	52.2%	11.1%	1959

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Honolulu County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Honolulu County, both outside Hawaii so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside HI (682 bridges here).

Caddo County, LA · 682 bridges
Chester County, PA · 680 bridges
El Paso County, CO · 686 bridges
Broward County, FL · 686 bridges

Similar average build year

Nearest mean year-built outside HI (1963 here).

Worcester County, MA · avg 1963 · 1,014 bridges
Essex County, NJ · avg 1963 · 505 bridges
Passaic County, NJ · avg 1963 · 333 bridges

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 682 Good 244 Fair 391 Poor 47

All bridges (682)

Sort:

Honolulu County Bridge Snapshot

Condition distribution

Honolulu County's Poor-condition bridges carry 812,568 vehicle crossings a day

75.2% of Honolulu County's bridges have passed the 50-year mark

One structure carries 13.6% of the county's Poor-condition bridge traffic

How Honolulu County compares with Hawaii's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

All bridges (682)

N KING ST

KAL HWY

KALIHI ST

NUUANU AVE

TERM 2-A AIRPORT

RAMP IW-A

NIMITZ HWY

KAL HWY

SAND ISLAND RD

KAM HWY

FAI-H1

BERETANIA ST

KAHALA AVE

AHIKI ST

MAMALA BAY DRIVE

MOANALUA RD

AIEA HTS ACC RD

KAM HWY

KAM HWY

KAL HWY

FARR HWY

ONEAWA ST

KAM HWY

KAM HWY

MOANALUA RD

KAHALOA DR.

FARR HWY

KAM HWY

RAMP WE

FAI-H1

LILIHA ACC RD

LILIHA ST

RAMP 92 EB1A

N SCHOOL ST

WYLLIE ST

EAST HIND DR.

AIEA HTS DR

PLT RD

MOKAPU ROAD

FAI-H1(HWY OP)

FAI-H2(O.B.)

FAI-H2(I.B.)

TERM 2-C AIRPORT

RAMP DF

Lagoon Dr

KAILUA RD

ALA AOLANI

ALA AOLANI LOOP

WAIPAHU ST

LIKELIKE HWY OB

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