U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


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Bridges & Structures

The Impact of Load Rating Methods on Federal Bridge Program Funding

Table Versions of Images

Image 1: Percent Change in Deck area as a result of percent change in Item 66 (SR ≤ 80)
Factored All Highway - SR < 50 + 0.68(SR ≤ 80 & SR ≥ 50)
NBI Item 66 varies from - 20% to +20%Percent Change in Deck Area
-2011.34910159
-158.059694925
-104.966131374
-51.935235654
5-1.240089404
10-2.361242826
15-3.244527946
20-4.294749985
Image 2: Percent Change in Deck Area as a Result of Percent Change in Item 66 (SR ≤ 80)
NBI Item 66 varies from - 20% to +20%Percent Change in Deck Area
 All HighwaysFederal-Aid SystemOff System
-208.4750863618.7110777.505878252
-156.0990913846.23235.550088295
-103.7879822323.7580343.908309186
-51.4405339871.3043192.002630669
5-0.739572721-0.74751-0.707871356
10-1.433064803-1.21153-2.346298055
15-1.961039964-1.74469-2.853652783
20-2.685987749-2.20534-4.668199802
Image 3: Percent Change in Deck Area as a Result of Percent Change in Item 66 (SR < 50)
NBI Item 66 varies from - 20% to +20%Percent Change in Deck Area
 All HighwaysFederal-Aid SystemOff System
-2029.3716279832.7309220.24546467
-1520.3543510922.459814.61376675
-1012.354131213.447989.342688911
-55.0374369825.123154.803071968
5-4.378755832-4.79088-3.267985726
10-8.181710558-8.62654-6.985182564
15-11.29309213-11.8812-9.70447646
20-14.38306112-14.693-13.54848668
Image 4: Percent Change in Deck Area as a Result of Percent Change in NBI Item 66 (SR ≥ 50 and SR ≤ 80)
NBI Item 66 varies from - 20% to +20%Percent Change in Deck Area
 All HighwaysFederal-Aid SystemOff System
-20-2.235653577-1.95075-3.725375602
-15-1.207590373-0.97069-2.440475149
-10-0.602686594-0.5431-0.882654682
-5-0.403096086-0.39077-0.466245956
51.1257284651.0472471.549132399
102.026023832.0798091.743355078
152.8222005192.7546673.186051904
203.3094689723.3376093.160685131
Updated: 08/21/2013
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000