M-3 SB CONN over I-75 & I-375


+42.34366, -83.04361
42°20'37" N, 83°02'37" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:M-3 SB CONN over I-75 & I-375
Structure number:000000000011809
Old structure number:82182251000S082 (from 1992 edition)
Location:IN DETROIT OVER I-375
Purpose:Carries highway over highway
Route classification:Principal Arterial - Other Freeways or Expressways (Urban) [12]
Length of largest span:79.1 ft. [24.1 m]
Total length:361.6 ft. [110.2 m]
Roadway width between curbs:41.0 ft. [12.5 m]
Deck width edge-to-edge:44.6 ft. [13.6 m]
Vertical clearance below bridge:16.4 ft. [5.0 m]
Skew angle:12°
Owner:State Highway Agency [01]
Year built:1964
Year reconstructed:1998
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18+Mod / HS 20+Mod [6]
Number of main spans:7
Main spans material:Steel [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: October 2018

Good/Fair/Poor Condition:Good
Status:Open, no restriction [A]
Average daily traffic:22,748 [as of 2007]
Deck condition:Good [7 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Underclearances appraisal:Equal to present minimum criteria [6]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:99.0

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
October 2018GoodGoodGoodGood2274899.0
November 2017GoodGoodGoodGood2274899.0
November 2015GoodGoodGoodGood2274899.0
March 2014PoorGoodSeriousGood2274855.0
March 2012PoorGoodSeriousGood2274855.0
April 2010PoorVery GoodSeriousVery Good2274855.0
May 2008FairVery GoodSatisfactoryGood2274899.0
May 2006PoorVery GoodPoorSatisfactory1416668.0
February 2005PoorVery GoodPoorFair1011072.0
November 2003PoorVery GoodPoorFair1011068.0
August 2001PoorVery GoodPoorFair1011068.0
August 1998PoorSeriousPoorPoor1011058.0
July 1997PoorSeriousPoorPoor1011049.0
September 1996PoorPoorFairPoor1011069.0
August 1994PoorPoorFairFair1011085.0
August 1992FairFairSatisfactoryFair1011087.0
June 1990FairFairGoodSatisfactory1011098.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.2,9002,80010000
Reinforced Concrete Decksq. ft.16,16415,94422000
Concrete Protective Coatingsq. ft.10,12510,125000
Reinforced Concrete Columneach2421300
Reinforced Concrete Abutmentlinear ft.9996300
Reinforced Concrete Pier Caplinear ft.2682482000
Strip Seal Jointlinear ft.225225000
Pourable Jointlinear ft.99850140
Other Jointlinear ft.4545000
Movable Bearingeach5959000
Fixed Bearingeach5959000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.1,0851,080500