National Bridge Inventory: Michigan Congressional District 11


  • Of the 1,534 bridges in the counties of this district, 159, or 10.4 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 182 bridges classified as structurally deficient in 2019.
  • Repairs are needed on 324 bridges in the district, which will cost an estimated $1.0 billion.
  • This compares to 346 bridges that needed work in 2019.
  • There currently are now projects in the District that use IIJA formula bridge funds.

County Year Built Daily Crossings Type of Bridge Location
Oakland 1971 209,200 Urban Interstate I-696 over I-75 & 4 Ramps
Wayne 1971 98,506 Urban Interstate I-94 over Ent to Ford Plant
Wayne 1963 92,920 Urban freeway/expressway M-39 over Ecorse Creek
Wayne 1970 78,863 Urban Interstate I-96 WB Main Rdwy over M-39 (Southfield Expr)
Wayne 1962 74,175 Urban Interstate I-94 WB over Ecorse Rd
Wayne 1971 65,653 Urban Interstate I-275 SB over Schoolcraft Rd
Wayne 1953 63,154 Urban freeway/expressway M-10 WB over I-94 Ramp from M-10
Oakland 1967 61,150 Urban Interstate Ramp P to M-10 over I-696
Wayne 1969 60,400 Urban other principal arterial M-102 8 mile Rd over I-75
Wayne 1962 60,077 Urban Interstate I-94 EB over Beech-Daly Rd
Wayne 1955 59,083 Urban Interstate I-94 EB over I-94 Ramp to M-10
Wayne 1928 53,839 Urban other principal arterial Allen & Pelham Rds over Sexton Kilfoil Drain
Wayne 1962 42,800 Urban minor arterial Jefferson Ave over I-375
Wayne 1971 42,538 Urban other principal arterial M-153 WB over Hines Drive
Wayne 1958 40,380 Urban other principal arterial Wayne Road over Tonquish Creek
Oakland 1964 40,292 Urban other principal arterial I-75 Br over Clinton River
Wayne 1951 40,205 Urban other principal arterial Merriman Road over E N Hines Drive
Wayne 1929 39,205 Urban other principal arterial Merriman Road over Middle Rouge River
Wayne 1924 36,754 Urban other principal arterial Southfield Road over Ecorse Creek
Wayne 1971 35,830 Urban other principal arterial M-153 WB over Rouge River
Wayne 1971 35,830 Urban other principal arterial M-153 EB over Rouge River
Wayne 1960 35,730 Urban minor arterial Base Line over CSX RR
Wayne 1964 30,846 Urban minor arterial Rotunda Drive over Rouge River (Re-Located)
Wayne 1975 28,663 Urban other principal arterial Evergreen Road over Rouge River
Wayne 1947 27,486 Urban other principal arterial Wayne Road over E N Hines Drive
Type of Bridge Number of Bridges Area of All Bridges
(sq. meters)
Daily Crossings on All Bridges Number of Structurally Deficient Bridges Area of Structurally Deficient Bridges
(sq. meters)
Daily Crossings on Structurally Deficient Bridges
Rural Interstate 9 12,063 540,608 0 0 0
Rural arterial 2 1,511 48,257 0 0 0
Rural minor arterial 8 4,875 88,820 1 101 8,000
Rural major collector 23 12,122 112,452 4 836 19,784
Rural minor collector 5 1,198 13,680 0 0 0
Rural local road 58 8,693 68,205 15 1,355 14,987
Urban Interstate 320 555,043 16,202,453 13 34,709 778,357
Urban freeway/expressway 74 85,606 2,695,675 4 2,988 169,874
Urban other principal arterial 335 391,667 7,971,035 33 43,358 773,767
Urban minor arterial 303 300,449 4,247,236 44 42,227 568,796
Urban collector 128 90,154 1,291,900 14 9,294 69,324
Urban local road 269 178,215 1,365,595 31 8,168 49,700
Total 1,534 1,641,598 34,645,916 159 143,035 2,452,589
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 33 $84.3 557,560 19,935
Widening & rehabilitation 11 $37.8 398,200 13,132
Rehabilitation 163 $349.0 2,102,289 121,349
Deck rehabilitation/replacement 105 $483.4 2,965,751 167,932
Other structural work 12 $58.4 132,150 20,351
Total 324 $1,012.9 6,155,950 342,700

Data includes information for the following area(s): Oakland County, Wayne County

About the data:

Data and cost estimates are from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), downloaded on July 3, 2023. Note that specific conditions on bridges may have changed as a result of recent work or updated inspections.

Effective January 1, 2018, FHWA changed the definition of structurally deficient as part of the final rule on highway and bridge performance measures, published May 20, 2017 pursuant to the 2012 federal aid highway bill Moving Ahead for Progress in the 21st Century Act (MAP-21). Two measures that were previously used to classify bridges as structurally deficient are no longer used. This includes bridges where the overall structural evaluation was rated in poor or worse condition, or where the adequacy of waterway openings was insufficient.

The new definition limits the classification to bridges where one of the key structural elements—the deck, superstructure, substructure or culverts, are rated in poor or worse condition. During inspection, the conditions of a variety of bridge elements are rated on a scale of 0 (failed condition) to 9 (excellent condition). A rating of 4 is considered “poor” condition.

Cost estimates have been derived by ARTBA, based on 2022 average bridge replacement costs for structures on and off the National Highway System, published by FHWA. Bridge rehabilitation costs are estimated to be 68 percent of replacement costs. A bridge is considered to need repair if the structure has identified repairs as part of the NBI, a repair cost estimate is supplied by the bridge owner or the bridge is classified as structurally deficient. Please note that for a few states, the number of bridges needing to be repaired can vary significantly from year to year, and reflects the data entered by the state.

Bridges are classified by FHWA into types based on the functional classification of the roadway on the bridge. Interstates comprise routes officially designated by the Secretary of Transportation. Other principal arterials serve major centers of urban areas or provide mobility through rural areas. Freeways and expressways have directional lanes generally separated by a physical barrier, and access/egress points generally limited to on- and off-ramps. Minor arterials serve smaller areas and are used for trips of moderate length. Collectors funnel traffic from local roads to the arterial network; major collectors have higher speed limits and traffic volumes and are longer in length and spaced at greater intervals, while minor collectors are shorter and provide service to smaller communities. Local roads do not carry through traffic and are intended for short distance travel.

9
Compared to 9 in 2022

in the nation in % of structurally deficient bridges

1. West Virginia 20.0%
8. Louisiana 12.0%
9. Michigan 11.0%
10. North Dakota 11.0%

12
Compared to 12 in 2022

in the nation in # of structurally deficient bridges

1. Iowa 4,558
11. Kansas 1,305
12. Michigan 1,292
13. Ohio 1,251

10
Compared to 11 in 2022

in the nation in % of structurally deficient bridge deck area

1. Rhode Island 15.0%
9. South Dakota 10.0%
10. Michigan 8.0%
11. Missouri 8.0%
Full State Ranking

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  • Source: Data is from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), downloaded on July 3, 2023. Note that specific conditions on bridges may have changed as a result of recent work or updated inspections.

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