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


+42.34345, -83.04354
42°20'36" N, 83°02'37" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:M-3 NB CONN over I-75 & I-375
Structure number:000000000011808
Old structure number:82182251000S081 (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:44.0 ft. [13.4 m]
Deck width edge-to-edge:47.2 ft. [14.4 m]
Vertical clearance below bridge:13.1 ft. [4.0 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:Equal to present minimum criteria [6]
Underclearances appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
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 2017FairGoodSatisfactoryGood2274899.0
November 2015FairGoodSatisfactoryGood2274899.0
March 2014PoorGoodSeriousGood2274855.0
March 2012PoorGoodSeriousGood2274855.0
April 2010PoorVery GoodSeriousGood2274855.0
May 2008FairVery GoodSatisfactoryGood2274899.0
May 2006PoorVery GoodFairPoor2833269.0
February 2005PoorVery GoodFairPoor1348073.0
November 2003PoorVery GoodFairPoor1348069.0
November 2002PoorVery GoodFairPoor1348069.0
August 2001PoorVery GoodFairPoor1348069.0
May 2000PoorVery GoodFairPoor1348069.0
September 1999PoorSeriousFairSerious1348042.0
August 1998PoorSeriousFairSerious1348047.0
July 1997PoorPoorFairSerious1348033.0
September 1996PoorPoorFairPoor1348068.0
August 1994PoorPoorFairFair1348084.0
August 1992PoorSatisfactorySatisfactoryPoor1348068.0
June 1990FairSatisfactoryGoodSatisfactory1348095.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.3,2553,15510000
Reinforced Concrete Decksq. ft.21,70021,700000
Reinforced Concrete Columneach2424000
Reinforced Concrete Abutmentlinear ft.128128000
Reinforced Concrete Pier Caplinear ft.374374000
Strip Seal Jointlinear ft.255255000
Pourable Jointlinear ft.101101000
Other Jointlinear ft.5151000
Movable Bearingeach7007000
Fixed Bearingeach7007000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.72442430000