I 20 WB over US 78 (AL-4)


+33.53113, -86.71143
33°31'52" N, 86°42'41" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:I 20 WB over US 78 (AL-4)
Structure number:011070
Location:I 20 * US 78
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:105.0 ft. [32.0 m]
Total length:1009.9 ft. [307.8 m]
Roadway width between curbs:52.8 ft. [16.1 m]
Deck width edge-to-edge:55.4 ft. [16.9 m]
Vertical clearance below bridge:17.4 ft. [5.3 m]
Skew angle:99°
Owner:State Highway Agency [01]
Year built:1974
Year reconstructed:1989
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:10
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 2014 

Status:Open, no restriction [A]
Average daily traffic:27,875 [as of 2013]
Truck traffic:16% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
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:Better than present minimum criteria [7]
Scour condition:Bridge not over waterway. [N]
Operating rating:84.7 tons [77.0 metric tons]
Inventory rating:50.7 tons [46.1 metric tons]
Sufficiency rating:94.4
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$17,569,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
November 201494.4Not deficientSatisfactorySatisfactoryGood27875
November 201283.4Not deficientSatisfactoryFairSatisfactory24165
October 201083.4Not deficientSatisfactoryFairSatisfactory23415
October 200883.4Not deficientGoodFairGood23805
October 200683.5Not deficientGoodFairGood23155
October 200483.5Not deficientGoodFairGood22830
October 200283.5Not deficientGoodFairGood22885
October 200083.6Not deficientGoodFairGood22430
November 199882.6Not deficientGoodFairGood31265
August 199682.7Not deficientGoodFairGood30560
August 199483.6Not deficientGoodFairGood27540
September 199295.3Not deficientGoodGoodGood22115