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:17.7 ft. [5.4 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: November 2015 

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]
Operating rating:71.9 tons [65.4 metric tons]
Inventory rating:43.1 tons [39.2 metric tons]
Sufficiency rating:99.0

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
November 201599.0Not deficientGoodGoodGood22748
March 201455.0Structurally deficientGoodSeriousGood22748
March 201255.0Structurally deficientGoodSeriousGood22748
April 201055.0Structurally deficientVery GoodSeriousVery Good22748
May 200899.0Not deficientVery GoodSatisfactoryGood22748
May 200668.0Not deficientVery GoodPoorSatisfactory14166
February 200572.0Not deficientVery GoodPoorFair10110
November 200368.0Not deficientVery GoodPoorFair10110
August 200168.0Not deficientVery GoodPoorFair10110
August 199858.0Not deficientSeriousPoorPoor10110
July 199749.0Structurally deficientSeriousPoorPoor10110
September 199669.0Structurally deficientPoorFairPoor10110
August 199485.0Structurally deficientPoorFairFair10110
August 199287.0Not deficientFairSatisfactoryFair10110
June 199098.0Not deficientFairGoodSatisfactory10110