National Bridge Inventory: Illinois



  • Of the 26,848 bridges in the state, 2,374, or 8.8 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is up from 2,157 bridges classified as structurally deficient in 2016.
  • The deck area of structurally deficient bridges accounts for 12.2 percent of total deck area on all structures.
  • 179 of the structurally deficient bridges are on the Interstate Highway System. A total of 82.6 percent of the structurally deficient bridges are not on the National Highway System, which includes the Interstate and other key roads linking major airports, ports, rail and truck terminals.
  • 1,198 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
  • The state has identified needed repairs on 4,083 bridges at an estimated cost of $5.6 billion.
  • This compares to 4,009 bridges that needed work in 2016.

County Year Built Daily Crossings Type of Bridge Location
Cook 1962 214,100 Urban Interstate I- 90,94 Elev Exp over Stewart Ave to 28 Pl
Cook 1962 188,500 Urban Interstate I- 90,94 Ryan Elev over 18th to 22nd Sts
DuPage 1959 164,000 Urban Interstate I- 55 over Madison St
Cook 1963 158,300 Urban freeway/expressway IL 53 NB over Kirchoff Rd
Cook 1963 158,300 Urban freeway/expressway IL 53 SB over Kirchoff Rd
Cook 1949 154,600 Urban Interstate I- 94 Bishop Ford over RR - Ihb & CSXt
Cook 1949 148,500 Urban Interstate I- 94, US 41 Edens over Skokie River
DuPage 1960 146,900 Urban Interstate I- 55 over Lemont Rd
Cook 1964 145,800 Urban freeway/expressway IL 53 NB Fap 342 over US 14 NW Hwy & UP RR
Cook 1963 145,800 Urban freeway/expressway IL 53 SB over Industrial Ave
Cook 1964 145,800 Urban freeway/expressway IL 53 SB over US 14&UPRR Fau3512
Cook 1963 145,800 Urban freeway/expressway IL 53 NB over Industrial Ave
DuPage 1970 145,000 Urban Interstate I-290 over Salt Creek
Cook 1937 132,400 Urban other principal arterial Lake Shore Drive over Main Br Chicago Riv
Cook 1964 128,800 Urban freeway/expressway IL 53 NB over Palatine Rd
Cook 1965 119,300 Urban freeway/expressway IL 53 Fap 342 over Anderson Dr Ms 3240
Cook 1986 119,300 Urban other principal arterial Lsd-Ramp 3 over Land
St. Clair 1963 117,700 Urban Interstate Poplar Street Bridge
Cook 1986 113,900 Urban other principal arterial Lake Shore Dr over Wacker Drive
Will 1980 113,800 Urban Interstate I- 55 over IL 53
Cook 1986 109,200 Urban other principal arterial Lake Shore Dr over Lower Lsd & Land
Will 1955 92,600 Urban Interstate I- 55 over Joliet Rd
Cook 1956 91,200 Urban other principal arterial Ohio St Feeder W A over RR - Up,Trib Parking
Cook 1961 91,200 Urban other principal arterial Ohio St Jfk Feeder over N Br Chicago River
Cook 1969 87,800 Urban Interstate I-290 & IL 53 over IL 58 (Golf Rd)
Type of Bridge Number of Bridges Area of All Bridges
(sq. meters)
Daily Crossings on All Bridges Number of Structurally Deficient Bridges Area of Structurally Deficient Bridges
(sq. meters)
Daily Crossings on Structurally Deficient Bridges
Rural Interstate 879 791,717 10,011,662 69 95,556 652,675
Rural arterial 858 548,017 4,096,450 59 49,118 295,550
Rural minor arterial 1,527 760,236 3,899,925 107 84,845 282,600
Rural major collector 3,232 1,049,047 3,156,785 265 101,645 243,110
Rural minor collector 1,436 382,750 730,065 132 31,842 80,635
Rural local road 12,200 2,067,046 1,401,379 1,024 139,577 113,409
Urban Interstate 1,444 2,965,185 64,870,775 110 342,195 4,211,125
Urban freeway/expressway 216 298,250 6,074,450 25 62,226 1,675,050
Urban other principal arterial 1,362 2,092,966 30,053,625 139 337,946 3,530,825
Urban minor arterial 1,273 1,290,124 13,417,625 128 188,922 1,441,250
Urban collector 1,079 803,819 5,117,060 143 150,642 762,545
Urban local road 1,342 498,881 1,553,952 173 55,778 183,535
Total 26,848 13,548,037 144,383,753 2,374 1,640,293 13,472,309
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 1,542 $2,559 11,558,534 1,309,209
Widening & rehabilitation 280 $473 4,177,195 354,804
Rehabilitation 2,048 $2,040 14,908,792 1,533,049
Deck rehabilitation/replacement 66 $209 3,704,625 156,451
Other structural work 147 $325 1,986,810 244,278
Total 4,083 $5,606 36,335,956 3,597,790

About the data:

Data is from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), downloaded on March 11, 2021. Note that specific conditions on bridges may have changed as a result of recent work or updated inspections. Cost estimates were downloaded by ARTBA on March 11, 2021.

Effective January 1, 2018, FHWA changed the definition of structurally deficient as part of the final rule on highway and bridge performance measures, published May 20, 2017 pursuant to the 2012 federal aid highway bill Moving Ahead for Progress in the 21st Century Act (MAP-21). Two measures that were previously used to classify bridges as structurally deficient are no longer used. This includes bridges where the overall structural evaluation was rated in poor or worse condition, or where the adequacy of waterway openings was insufficient.

The new definition limits the classification to bridges where one of the key structural elements—the deck, superstructure, substructure or culverts, are rated in poor or worse condition. During inspection, the conditions of a variety of bridge elements are rated on a scale of 0 (failed condition) to 9 (excellent condition). A rating of 4 is considered “poor” condition.

Cost estimates have been derived by ARTBA, based on 2019 average bridge replacement costs for structures on and off the National Highway System, published by FHWA. Bridge rehabilitation costs are estimated to be 68 percent of replacement costs. A bridge is considered to need repair if the structure has identified repairs as part of the NBI, a repair cost estimate is supplied by the bridge owner or the bridge is classified as structurally deficient. Please note that for a few states, the number of bridges needing to be repaired can vary significantly from year to year, and reflects the data entered by the state.

Bridges are classified by FHWA into types based on the functional classification of the roadway on the bridge. Interstates comprise routes officially designated by the Secretary of Transportation. Other principal arterials serve major centers of urban areas or provide mobility through rural areas. Freeways and expressways have directional lanes generally separated by a physical barrier, and access/egress points generally limited to on- and off-ramps. Minor arterials serve smaller areas and are used for trips of moderate length. Collectors funnel traffic from local roads to the arterial network; major collectors have higher speed limits and traffic volumes and are longer in length and spaced at greater intervals, while minor collectors are shorter and provide service to smaller communities. Local roads do not carry through traffic and are intended for short distance travel.

15
Compared to 20 in 2019

in the nation in % of structurally deficient bridges

1. West Virginia 21.2%
14. Missouri 8.9%
15. Illinois 8.8%
16. Alaska 8.6%

3
Compared to 4 in 2019

in the nation in # of structurally deficient bridges

1. Iowa 4,571
2. Pennsylvania 3,353
3. Illinois 2,374
4. Oklahoma 2,326

3
Compared to 6 in 2019

in the nation in % of structurally deficient bridge deck area

1. Rhode Island 21.0%
2. West Virginia 15.0%
3. Illinois 12.0%
4. Massachusetts 12.0%
Full State Ranking

Advertisement


  • Source: Data is from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), downloaded on March 11, 2021. Note that specific conditions on bridges may have changed as a result of recent work or updated inspections.

    ARTBA is a non-partisan federation whose primary goal is to aggressively grow and protect transportation infrastructure investment to meet the public and business demand for safe and efficient travel.

  • Privacy & Cookies Policy
Connect With Us

Copyright © 2021 American Road & Transportation Builders Association