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Willow Run Expressway Bridge R01 (Eastbound)


Looking Northwest

Through the center span of the eastbound bridge. The twin westbound bridge can be seen in the background.

Photo taken by Dietrick Floerer, June 1995, for HAER

View photos at Library of Congress

BH Photo #120450



Beam bridge over Conrail on US-12 Eastbound in Ypsilanti
Ypsilanti, Washtenaw County, Michigan
Open to traffic
Built 1941; Rehabilitated 1966; Rehabilitated 1995
- Conrail (CR)
These virtual twin structures, one carrying eastbound traffic and the other westbound, are similar in design and construction varying only with differences in dimensions. Both consist of three spans, supported by two piers and concrete abutments. Each carries four 11' lanes and two 14' paved shoulders carried by continuous concrete T-beams.
These bridges created a grade separation for the first limited access highway in Michigan, crossing railroad tracks that supplied the Willow Run B-24 bomber plant. The expressway, in turn, carried the huge workforce from Detroit to the Willow Run plant. The twin bridges are the only extant remains of the original expressway.
Length of largest span: 55.8 ft.
Total length: 138.8 ft.
Deck width: 70.5 ft.
Also called
US-12 EB
Approximate latitude, longitude
+42.24611, -83.55944   (decimal degrees)
42°14'46" N, 83°33'34" W   (degrees°minutes'seconds")
Approximate UTM coordinates
17/288844/4680274 (zone/easting/northing)
Quadrangle map:
Ypsilanti East
Average daily traffic (as of 2007)
Inventory numbers
MINBI 81181063000R010 (Michigan bridge number on the National Bridge Inventory 2010 and before)
MINEW 10845 (Michigan bridge number on the National Bridge Inventory 2011 and later)
BH 37117 (Bridgehunter.com ID)
Inspection report (as of July 2016)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 87.8 (out of 100)
View more at BridgeReports.com

Update Log 

  • August 9, 2008: Added by J.R. Manning


  • J.R. Manning - thekitchenguy [at] sbcglobal [dot] net
  • HAER MI-97-A - Willow Run Expressway Bridge No. R01, Spanning Conrail Railway, eastbound, at US-10, Ypsilanti vicinity, Washtenaw County, MI