Total bridges
508
Public highway bridges in Oakland County
County profile · official public datasets
Oakland County, MI
508 public highway bridges tracked in the FHWA National Bridge Inventory: 41.5% rated Good, 51% Fair, 7.5% Poor.
- 508
- Public bridges
- 41.5%
- Good condition
- 7.5%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Oakland County pairs a better-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- Top 34%
- lowest Poor share in state
- 7.5%
- Poor-condition share
- 508
- public highway bridges
- 1982
- 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.
Oakland County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Oakland County ranks #28 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 7.5%). Oakland County, Michigan contains 508 public highway bridges. Roughly 41.5% are rated “Good,” 51% “Fair,” and 7.5% “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.
Good condition
41.5%
211 of 508 rated 7-9
Fair condition
51%
259 of 508 rated 5-6
Poor condition
7.5%
38 of 508 rated 4 or below
In-state Poor-share rank
#28 of 83
Among Michigan counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 508 NBI-tracked bridges by lowest applicable component rating.
Good 41.5% (211)
Fair 51% (259)
Poor 7.5% (38)
Oakland County's Poor-condition bridges carry 449,398 vehicle crossings a day
That is 3.6% of the county's reported daily bridge traffic on 7.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 11,826 crossings a day against 25,061 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 507 of 508 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
45.5% of Oakland County's bridges have passed the 50-year mark
231 of the 508 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 41.5% 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 46.6% of the county's Poor-condition bridge traffic
I-696 over I-75 & 4 RAMPS, built 1971, carries 209,200 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 38-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 449,398 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Oakland County's bridges were built
508 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1920s 6
1920–1929
6 bridges
- 1930s 9
1930–1939
9 bridges
- 1940s 5
1940–1949
5 bridges
- 1950s 30
1950–1959
30 bridges
- 1960s
1960–1969
125 bridges
- 1970s
1970–1979
70 bridges
- 1980s
1980–1989
84 bridges
- 1990s
1990–1999
54 bridges
- 2000s 49
2000–2009
49 bridges
- 2010s 40
2010–2019
40 bridges
- 2020s 35
2020–2029
35 bridges
What this shows Construction peaked in the 1960s, when 125 of the county's bridges still in the inventory were built, which is 24.6% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1982, 6 years newer than the Michigan average of 1976.
How Oakland County compares with Michigan's closest counties by inventory size
The 5 Michigan counties nearest Oakland County in number of bridges, with their condition splits. Its 7.5% Poor share is the 2nd-lowest of these 6. Its average build year of 1982 against a peer-group mean of 1977 is 5 years newer.
Showing the 5 closest of 82 Michigan counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Kent County | 523 | 36.9% | 57.7% | 5.4% | 1975 |
| Oakland County (this page) | 508 | 41.5% | 51% | 7.5% | 1982 |
| Macomb County | 417 | 42.7% | 49.6% | 7.7% | 1980 |
| Genesee County | 371 | 22.9% | 61.7% | 15.4% | 1968 |
| St. Clair County | 327 | 41.3% | 50.5% | 8.3% | 1985 |
| Saginaw County | 315 | 28.9% | 52.7% | 18.4% | 1979 |
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 Oakland 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 Oakland County, both outside Michigan so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MI (508 bridges here).
- Morris County, NJ · 508 bridges
- Wood County, OH · 508 bridges
- Douglas County, NE · 509 bridges
- Linn County, IA · 506 bridges
Similar average build year
Nearest mean year-built outside MI (1982 here).
- Oklahoma County, OK · avg 1982 · 1,216 bridges
- Jackson County, MO · avg 1982 · 930 bridges
- Milwaukee County, WI · avg 1982 · 893 bridges
- Champaign County, IL · avg 1982 · 727 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (508)
NOVI ROAD
FairOver: TRIB TO INGERSOL CREEK
NOVI TWP SEC 26/27, Oakland, MI
Built 1960 Load: 97.2 t ADT: 19,500
GOLDEN LANE
FairOver: UNKNOWN CHANNEL
W BLOOMFIELD TWP SEC 29, Oakland, MI
Built 1997 Load: 97.2 t ADT: 500
I-75 BR
FairOver: CLINTON RIVER
AT ORCHARD LAKE RD, Oakland, MI
Built 1964 Load: 97.2 t ADT: 40,292
UNION STREET
FairOver: CLINTON RIVER
S OF UNIVERSITY DR, Oakland, MI
Built 1963 Load: 97.2 t ADT: 200
E PIKE STREET
FairOver: CLINTON RIVER
W OF WOODWARD, Oakland, MI
Built 1963 Load: 97.2 t ADT: 200
WATER STREET
FairOver: CLINTON RIVER
W OF WOODWARD, Oakland, MI
Built 1963 Load: 97.2 t ADT: 200
AUBURN AVENUE
FairOver: CLINTON RIVER
BTWN SAGINAW AND WOODWARD, Oakland, MI
Built 1963 Load: 97.2 t ADT: 200
BAGLEY STREET
FairOver: CLINTON RIVER
S OF ORCHARD LAKE RD, Oakland, MI
Built 1975 Load: 97.2 t ADT: 200
DARTMOUTH ROAD
FairOver: PAINT CREEK
SECT 35/36 BRANDON TWP, Oakland, MI
Built 2000 Load: 97.2 t ADT: 350
BLMFLD HILLS PKWY
GoodOver: ROUGE RIVER TRIB /S CULV
IN BLOOMFIELD HILLS, Oakland, MI
Built 1987 Load: 15.6 t ADT: 3,000
ALLEN DRIVE
GoodOver: BARNARD DRAIN
0.2 MI S OF MAPLE ROAD, Oakland, MI
Built 1969 Load: 19.4 t ADT: 2,300
10 MILE RD
GoodOver: ROUGE RIVER
BET TELEGRAPH AND BEECH, Oakland, MI
Built 1995 Load: 20.2 t ADT: 16,418
CASS LAKE ROAD
GoodOver: CLINTON RIVER
BET ORCHARD LK AND CASS-E, Oakland, MI
Built 2007 Load: 24.3 t ADT: 17,800
12 MILE RD (WEST)
GoodOver: ROUGE RIVER
BET TELEGRAPH AND LAHSER, Oakland, MI
Built 1972 Load: 25.3 t ADT: 19,870
12 MILE RD (EAST)
GoodOver: ROUGE RIVER
BET TELEGRAPH AND LAHSER, Oakland, MI
Built 1972 Load: 25.3 t ADT: 19,870
M-59
GoodOver: CLINTON RIVER
4.0 MI W OF PONTIAC, Oakland, MI
Built 1965 Load: 26.6 t ADT: 37,281
CROOKS RD
GoodOver: M-59
3.4 MI E OF I-75, Oakland, MI
Built 2011 Load: 27.2 t ADT: 21,645
M-10 NWESTERN HWY
GoodOver: I-696 RAMP D
IN SOUTHFIELD, Oakland, MI
Built 1964 Load: 29.2 t ADT: 121,266
I-75 BL NB
GoodOver: OPDYKE ROAD
S LTS OF PONTIAC, Oakland, MI
Built 1966 Load: 29.2 t ADT: 37,709
NB ADAMS RD
GoodOver: M-59
ROCHESTER HILLS, Oakland, MI
Built 2004 Load: 29.2 t ADT: 11,900
MOHAWK AVENUE(UTN)
GoodOver: I-696
IN ROYAL OAK, Oakland, MI
Built 1984 Load: 30.1 t ADT: 1,559
BELLEVUE AVENUE
GoodOver: LAKE ORION CANAL
N OF HEIGHTS RD, Oakland, MI
Built 1998 Load: 30.1 t ADT: 930
10 MI RD
GoodOver: M-10
IN SOUTHFIELD, Oakland, MI
Built 1963 Load: 31.1 t ADT: 7,110
MAPLEFIELD U-TURN
GoodOver: I-696
0.4 M W OF WOODWARD, Oakland, MI
Built 1985 Load: 31.1 t ADT: 1,500
MOUNT VERNON ST
GoodOver: M-10
IN SOUTHFIELD (M-10), Oakland, MI
Built 1963 Load: 31.4 t ADT: 5,999
NB JOSLYN TO I-75
GoodOver: GTW RR
5.7 MI NW OF M-59, Oakland, MI
Built 1981 Load: 31.8 t ADT: 5,075
U-TURN E.OF GRNFLD
GoodOver: I-696
IN ROYAL OAK TOWNSHIP, Oakland, MI
Built 1987 Load: 32.1 t ADT: 4,000
M-5 NB MAINLINE
GoodOver: 12 MILE RD
I-96 I-696 M-5 INTRCHG, Oakland, MI
Built 1993 Load: 32.1 t ADT: 35,541
13 MILE RD
GoodOver: ROUGE RIVER
0.3 MI E OF LAHSER RD, Oakland, MI
Built 1999 Load: 32.4 t ADT: 16,576
FRANKLIN RD
GoodOver: PERNICK CREEK
IN SOUTHFIELD, Oakland, MI
Built 1992 Load: 32.4 t ADT: 19,439
BLMFLD HILLS PKWY
GoodOver: ROUGE RIVER TRIB /N CULV
IN BLOOMFIELD HILLS, Oakland, MI
Built 1975 Load: 32.4 t ADT: 3,000
ADAMS ROAD
GoodOver: ROUGE RIVER
BET WATTLES AND BIG BEAVE, Oakland, MI
Built 2004 Load: 32.7 t ADT: 16,577
DEQUINDRE ROAD
GoodOver: GIBSON DRAIN
BET WATTLES AND LONG LK R, Oakland, MI
Built 2003 Load: 32.7 t ADT: 22,495
BENSTEIN
GoodOver: HURON RIVER
NORTH OF OAKLEY PARK, Oakland, MI
Built 2008 Load: 32.7 t ADT: 12,380
LONG LAKE RD
GoodOver: ROUGE RIVER
BET ADAMS AND COOLIDGE RD, Oakland, MI
Built 1984 Load: 32.7 t ADT: 19,700
LONG LAKE RD
GoodOver: GIBSON DRAIN
BET JOHN R AND DEQUINDRE, Oakland, MI
Built 2004 Load: 32.7 t ADT: 22,575
KIRKWAY RD
GoodOver: LOWER LONG LAKE
0.2 MI N OF LONG LAKE RD, Oakland, MI
Built 2004 Load: 32.7 t ADT: 900
PERRY ST
GoodOver: PAINT CREEK
S OF FLINT ST, Oakland, MI
Built 1990 Load: 32.7 t ADT: 3,506
MAIN ST
GoodOver: HURON RIVER
IN MILFORD S OF CANAL ST, Oakland, MI
Built 1989 Load: 32.7 t ADT: 14,620
PETERS ST
GoodOver: HURON RIVER (MILL POND)
W OF MILFORD RD, Oakland, MI
Built 2008 Load: 32.7 t ADT: 1,500
OLD NOVI ROAD
GoodOver: MIDDLE RIVER ROUGE
0.15 MI E OF OAKLAND AVE, Oakland, MI
Built 1994 Load: 32.7 t ADT: 500
UNIVERSITY ST
GoodOver: PAINT CREEK
EAST OF ROCHESTER RD, Oakland, MI
Built 1966 Load: 32.7 t ADT: 9,380
SECOND ST
GoodOver: PAINT CREEK
EAST OF ROCHESTER RD, Oakland, MI
Built 2003 Load: 32.7 t ADT: 12,710
SHAGBARK ROAD
GoodOver: SARGENT CREEK
0.3 MI N OF WALTON BLVD, Oakland, MI
Built 1965 Load: 32.7 t ADT: 809
SOUTER ROAD
GoodOver: BARNARD DRAIN
0.2 MI S OF MAPLE ROAD, Oakland, MI
Built 1974 Load: 32.7 t ADT: 950
SOUTH COMMERCE RD
GoodOver: HAYES CREEK
BET COMMERCE AND OAKLEY, Oakland, MI
Built 1993 Load: 32.7 t ADT: 11,950
DEER PATH TRAIL
GoodOver: PAINT CREEK DRAIN
IN SUBDIVISION SEC 33, Oakland, MI
Built 1999 Load: 32.7 t ADT: 500
OXBOW LAKE ROAD
GoodOver: CLINTON RIVER
SOUTH OF SCOUT TRAIL, Oakland, MI
Built 2007 Load: 32.7 t ADT: 4,540
WIXOM RD
GoodOver: UNNAMED TRIB
500 FT S OF 11 MILE RD, Oakland, MI
Built 2012 Load: 32.7 t ADT: 2,500
ASHBURY DRIVE
GoodOver: TRIB TO MIDDLE ROUGE RIV
CHASE FARMS SUBDIVISION, Oakland, MI
Built 2000 Load: 32.7 t ADT: 180
Read our methodology - how this data is sourced, computed, and verified.
Related
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.