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 |
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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 |
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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% |
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9. South Dakota | 10.0% |
10. Michigan | 8.0% |
11. Missouri | 8.0% |
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