County profile · official public datasets

Wayne County, MI

1,026 public highway bridges tracked in the FHWA National Bridge Inventory: 37.9% rated Good, 50.4% Fair, 11.7% Poor.

1,026
Public bridges
37.9%
Good condition
11.7%
Poor condition

The verdict

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

Wayne County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.

44th
of 83 on Poor share
11.7%
Poor-condition share
1,026
public highway bridges
1971
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.

Wayne County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Wayne County ranks #44 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 11.7%). Wayne County, Michigan contains 1,026 public highway bridges. Roughly 37.9% are rated “Good,” 50.4% “Fair,” and 11.7% “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

1,026

Public highway bridges in Wayne County

Good condition

37.9%

389 of 1,026 rated 7-9

Fair condition

50.4%

517 of 1,026 rated 5-6

Poor condition

11.7%

120 of 1,026 rated 4 or below

In-state Poor-share rank

#44 of 83

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

Condition distribution

Share of 1,026 NBI-tracked bridges by lowest applicable component rating.

Good
37.9% (389)
Fair
50.4% (517)
Poor
11.7% (120)

Wayne County's Poor-condition bridges carry 1,926,774 vehicle crossings a day

That is 8.7% of the county's reported daily bridge traffic on 11.8% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 16,056 crossings a day against 20,428 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 1,020 of 1,026 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

70.4% of Wayne County's bridges have passed the 50-year mark

722 of the 1,026 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 37.9% 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 5.1% of the county's Poor-condition bridge traffic

I-94 over ENT TO FORD PLANT, built 1971, carries 98,506 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 120-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 1,926,774 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Wayne County's bridges were built

1,026 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1970s, when 297 of the county's bridges still in the inventory were built, which is 28.9% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1971, 5 years older than the Michigan average of 1976.

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Wayne County compares with Michigan's closest counties by inventory size

The 5 Michigan counties nearest Wayne County in number of bridges, with their condition splits. Its 11.7% Poor share is the 5th-lowest of these 6. Its average build year of 1971 against a peer-group mean of 1978 is 7 years older.

Showing the 5 closest of 82 Michigan counties eligible for comparison.

Bridge inventory size and condition shares for Wayne County and the 5 Michigan counties closest to it in inventory size
County Bridges Poor
Wayne County (this page) 1,026 11.7%
Kent County 523 5.4%
Oakland County 508 7.5%
Macomb County 417 7.7%
Genesee County 371 15.4%
St. Clair County 327 8.3%

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 Wayne 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 Wayne County, both outside Michigan so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside MI (1,026 bridges here).

Similar average build year

Nearest mean year-built outside MI (1971 here).

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

All 1,026 Good 389 Fair 517 Poor 120

All bridges (1,026)

I-75 N TO M-10 RMP

Poor

Over: M-10 TO I-75N RAMP

IN DETROIT, Wayne, MI

Built 1970 Load: 41.5 t ADT: 17,500

I-75 SB EXIT RAMP

Poor

Over: I-75 E&W TO SB TURN RDWY

IN DETROIT, Wayne, MI

Built 1964 Load: 41.8 t ADT: 10,110

ROTUNDA DRIVE

Poor

Over: ROUGE RIVER (RE-LOCATED)

DEARBORN E/SOUTHFIELD, Wayne, MI

Built 1964 Load: 41.8 t ADT: 30,846

PIQUETTE

Poor

Over: I-75

IN DETROIT, Wayne, MI

Built 1966 Load: 42.8 t ADT: 1,662

M-153 EB

Poor

Over: ROUGE RIVER

IN DEARBORN, Wayne, MI

Built 1971 Load: 44.1 t ADT: 35,830

I-94 EB

Poor

Over: I-94 RAMP TO M-10

IN DETROIT OVER RAMP D-A, Wayne, MI

Built 1955 Load: 44.4 t ADT: 59,083

EVERGREEN ROAD

Poor

Over: ROUGE RIVER

DEARBORN N/MICHIGAN, Wayne, MI

Built 1975 Load: 44.4 t ADT: 28,663

INKSTER ROAD

Poor

Over: BELL CREEK

LIVONIA/REDFORD N/5 MILE, Wayne, MI

Built 1958 Load: 44.7 t ADT: 18,960

MCCLELLAN AVE

Poor

Over: I-94

IN DETROIT, Wayne, MI

Built 1957 Load: 45.0 t ADT: 5,880

M-153 WB

Poor

Over: ROUGE RIVER

IN DEARBORN, Wayne, MI

Built 1971 Load: 45.0 t ADT: 35,830

US-12 WB

Poor

Over: US-24

IN DEARBORN OVER US-24, Wayne, MI

Built 1937 Load: 46.0 t ADT: 23,295

VIRGIL ST

Poor

Over: I-96

IN DETROIT, Wayne, MI

Built 1970 Load: 46.0 t ADT: 5,500

NB M-39 SERVICE DR

Poor

Over: NORTH BR. ECORSE RIVER

IN ALLEN PARK, Wayne, MI

Built 1962 Load: 48.0 t ADT: 8,800

SIXTH ST

Poor

Over: JEFFERSON AVE

S OF JEFFERSON AVENUE, Wayne, MI

Built 1984 Load: 48.0 t ADT: 1,136

I-94EB RMP TO M-10

Poor

Over: I-94 WB & M-10 SB

IN DETROIT RAMP B-G, Wayne, MI

Built 1953 Load: 48.6 t ADT: 14,650

GREENFIELD ROAD

Poor

Over: ROUGE RIVER

DEARBORN/MELVINDAL S/I-94, Wayne, MI

Built 1928 Load: 49.2 t ADT: 9,800

M-39

Poor

Over: ECORSE CREEK

IN ALLEN PARK, Wayne, MI

Built 1963 Load: 50.5 t ADT: 92,920

OUTER DRIVE

Poor

Over: UPPER ROUGE RIVER

DETROIT S/I-96, Wayne, MI

Built 1927 Load: 51.2 t ADT: 14,610

HARBOR AVE

Poor

Over: CANAL

HARBOR ISLAND, Wayne, MI

Built 1984 Load: 53.2 t ADT: 313

MERRIMAN ROAD

Poor

Over: MIDDLE ROUGE RIVER

WESTLAND N/WARREN, Wayne, MI

Built 1929 Load: 57.0 t ADT: 39,205

MERRIMAN ROAD

Poor

Over: LOWER ROUGE RIVER

WAYNE/WESTLANDN/MICHIGAN, Wayne, MI

Built 1929 Load: 60.9 t ADT: 26,614

HANOVER RD

Poor

Over: ECORSE CREEK

DBN HGT BET HURON-MAYFAIR, Wayne, MI

Built 1977 Load: 60.9 t ADT: 2,500

M-10 WB

Poor

Over: I-94 RAMP FROM M-10

IN DETROIT OVER RAMP HE, Wayne, MI

Built 1953 Load: 61.2 t ADT: 63,154

INDUSTRIAL ROAD

Poor

Over: DIX ROAD

DEARBORN N/MILLER, Wayne, MI

Built 1930 Load: 68.7 t ADT: 10,257

LILLEY ROAD

Poor

Over: FELLOWS CREEK

CANTON N/CHERRY HILL, Wayne, MI

Built 1978 Load: 72.9 t ADT: 15,675

VREELAND ROAD

Poor

Over: FRANK & POET DRAIN

GIBRALTAR/TRENTON E/FORT, Wayne, MI

Built 1965 Load: 95.3 t ADT: 5,617

Read our methodology - how this data is sourced, computed, and verified.

Related

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.