I 20 over I 55 TO I 20 WEST


+32.27722, -90.20983
32°16'38" N, 90°12'35" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:I 20 over I 55 TO I 20 WEST
Structure number:11000200250449B
Location:3.7 MI E SR 18
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:134.8 ft. [41.1 m]
Total length:979.1 ft. [298.4 m]
Roadway width between curbs:50.9 ft. [15.5 m]
Deck width edge-to-edge:54.1 ft. [16.5 m]
Vertical clearance below bridge:16.1 ft. [4.9 m]
Owner:State Highway Agency [01]
Year built:1966
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:12
Main spans material:Steel continuous [4]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: August 2015 

Status:Open, no restriction [A]
Average daily traffic:33,000 [as of 2013]
Truck traffic:13% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Very Good [8 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Superior to present desirable criteria [9]
Underclearances appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Roadway alignment appraisal:Better than present minimum criteria [7]
Scour condition:Bridge not over waterway. [N]
Operating rating:64.4 tons [58.5 metric tons]
Inventory rating:38.6 tons [35.1 metric tons]
Sufficiency rating:75.1
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$999,999,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
August 201575.1Not deficientFairFairVery Good33000
August 201477.2Not deficientFairFairVery Good30000
July 201377.2Not deficientFairFairVery Good30000
August 201277.2Not deficientFairFairVery Good30000
July 201177.5Not deficientFairFairVery Good26000
November 201077.5Not deficientFairFairVery Good26000
September 200976.5Not deficientFairFairFair41500
July 200875.4Not deficientFairFairFair44500
August 200775.4Not deficientFairFairFair44500
September 200674.8Not deficientFairSatisfactoryFair54500
April 200589.6Not deficientGoodGoodVery Good47500
November 200389.4Not deficientGoodGoodVery Good51500
July 200290.0Not deficientGoodGoodVery Good40000
July 200190.0Not deficientGoodGoodVery Good40000
October 200089.0Not deficientGoodGoodVery Good29500
20000.0Not applicable---2000
August 199889.0Not deficientGoodGoodVery Good29500
January 199788.9Not deficientGoodGoodVery Good31000
February 199586.0Functionally obsoleteGoodGoodVery Good35500
April 199186.4Functionally obsoleteGoodGoodVery Good30500