America's Infrastructure: Bridges

7/28/2019 America's Infrastructure: Bridges

1/3

CAPITOL act & igur

traNPOrtatiON

th cOuNcil O tat gOvrNmNt

Americas Inrastructure: Bridges

Americas deteriorating infrastructure has been an ongo-ing concern for many years. The May 2013 collapse ofa bridge in Washington was the latest event to peak theinterests of the public and policymakers about the state,

safety and nancing of bridges and roads in the U.S.1

While the number o bridges deemed to be defcient has beendeclining over the past decade, more than 10 percent o the

nations bridges remain in need o repair or update. The average age of the 607,380 bridges in the U.S.

is 42 years.2 The percentage of bridges deemed decient has been

decreasing for the past decade as states and cities haveincreased efforts to prioritize repairs and replace-ments.3 In 2005, 13.1 percent of bridges were struc-turally decient and 15.1 percent were functionallyobsolete.

In 2012, 11 percent of the bridges throughout the U.S.were classied as structurally decient, while 14 per-

cent were classied as functionally obsolete. The Federal Highway Administration estimates that

there is a nearly $8 billion annual gap between whatfederal, state and local governments would need tospend and what is actually being spent to eliminate thenations decient bridge backlog by 2028.4

Although nearly 25 percent of the nations bridges areconsidered decient (structurally decient or function-ally obsolete), many of them are large-scale, urbanbridges that carry a high percentage of the nationstrafc. For example, the nations 66,749 structurally de-cient bridges make up slightly more than one-tenth ofthe total number of bridges, but one-third of the totalbridge decking areahow bridge size is measuredin

the country.5

Defciency levels on state-owned bridges vary signifcantly

across the country. States with the lowest percentage of state-owned

structurally decient bridges by count include Texas,0.8 percent, and Florida, 1 percent, while states withthe highest percentage of state-owned structurally de-cient bridges include Pennsylvania, 20.5 percent, andRhode Island, 19.7 percent.

States with the lowest percentage of state-owned func-tionally obsolete bridges by count include Nebraska,2.5 percent, and North Dakota, 2.8 percent, while

states with the highest percentage of state-ownedfunctionally obsolete bridges include Massachusetts, 47percent, and Hawaii, 34.1 percent.

When taking bridge sizeknown as decking areainto account, levels of deciency change. That is, stateswith the lowest percentage of state-owned structurallydecient bridges by decking area include Nevada, 0.9percent, and Georgia, 1.6 percent, while states withthe highest percentage of state-owned structurallydecient bridges by area include Rhode Island, 25.5percent, and Connecticut, 16.9 percent.

States with the lowest percentage of state-ownedfunctionally obsolete bridges by area include NorthDakota, 3.8 percent, and Minnesota, 7.3 percent, whilestates with the highest percentage of state-ownedfunctionally obsolete bridges by area include Massa-chusetts, 43.5 percent, and New York, 40.5 percent.


2/3

REFERENCES

1Unless otherwise noted, all data is derived from the Federal Highway Administration.http://www.fhwa.dot.gov22013 Report Card for Americas Infrastructure.American Society of Civil Engineers.http://www.infrastructurereportcard.org/a/#p/bridges/overview3Ibid.4Ibid.5Ibid.

Johnny Xu CSG Research Assistant |[email protected] &

Jennifer Burnett, CSG Program Manager, Fiscal and Economic Policy |jburnett@c sg.org


Srucury

Deficien BriDge

as defned by e Non Bde

inspeon ndds, bde

s sy defen ee

snfn od-yn eeens

e n poo ondon de o de-eoon o e deqy o e

wewy openn poded by

e bde s exeey nsen

o e pon o sn noebe

nepons. condon -

ns ne o 0 (ed ondon)

o 9 (exeen ondon). a soe

o 4 o ess ess n ssfon

o sy defen. ao

bde y be ssfed s s-

y defen, does no ne-

essy en s nse.

bde y en open o ,

b sy eqes snfn

nenne nd ep.

funciny

BSee BriDge

a nony obsoee bde s

one ws b o sndds

e no n se ody. tese

bdes y no e deqe

ne wds o deqe e

enes o see en -

f dend, o y osony

be ooded. tese bdes e no

neessy nse.

Deficien BriDge

a bde s ee sy

defen o nony obsoee.

Percentage o Bridges Considered Structurally

Defcient or Functionally Obsolete, 2005-2012

DefInITIOns:

13.1% 12.6% 12.0% 11.9% 12.0% 11.7% 11.4% 11.0%

15.1% 15.0%14.8% 14.8% 14.5% 14.2% 14.0% 14.0%

0%

5%

10%

15%

20%

25%

30%

35%

2005 2006 2007 2008 2009 2010 2011 2012

StructurallyDeficient Func


3/3

Nbe o Bdes e-Owned Bdes a Bdes

e-Owned ay

Defennony

Obsoee Defeny

Defennony

Obsoee Defen

ab 5,738 16,070 2.6% 17.2% 19.8% 9.0% 13.7% 22.7%

ask 807 1,173 10.2% 10.2% 20.3% 10.9% 12.5% 23.4%

azon 4,700 7,835 2.3% 8.6% 10.9% 3.2% 9.2% 12.4%

aknss 7,236 12,696 4.4% 12.7% 17.0% 7.1% 16.0% 23.1%

con 12,180 24,812 8.5% 18.3% 26.7% 12.0% 16.8% 28.8%

coodo 3,449 8,591 6.9% 12.8% 19.7% 6.6% 10.6% 17.1%

conne 2,804 4,208 7.3% 25.4% 32.7% 9.6% 25.4% 35.1%

Dewe 829 862 6.2% 13.6% 19.8% 6.1% 14.2% 20.3%

od 5,414 11,982 1.0% 10.9% 11.9% 2.2% 14.7% 16.9%

geo 6,632 14,739 1.6% 11.1% 12.6% 6.0% 12.7% 18.7%

hw 719 1,131 8.3% 34.1% 42.4% 12.9% 31.7% 44.7%

ido 1,311 4,214 3.9% 16.4% 20.3% 9.4% 10.4% 19.9%

inos 7,740 26,514 7.3% 11.3% 18.5% 8.7% 7.5% 16.2%

indn 5,315 18,789 7.0% 9.1% 16.1% 10.8% 11.6% 22.5%

iow 4,071 24,496 3.0% 7.1% 10.1% 21.2% 5.2% 26.4%

Knss 4,976 25,176 1.4% 9.6% 11.0% 10.6% 7.8% 18.3%

Kenky 8,975 14,031 6.7% 21.1% 27.7% 8.9% 22.9% 31.8%

losn 7,877 13,175 9.2% 18.3% 27.5% 13.5% 15.4% 29.0%

mne 1,965 2,408 13.1% 18.0% 31.1% 14.8% 18.1% 32.9%

mynd 2,560 5,294 3.8% 16.1% 19.9% 7.0% 20.8% 27.7%

mssses 3,459 5,120 9.2% 47.0% 56.2% 9.6% 43.2% 52.9%

mn 4,410 11,000 6.3% 20.8% 27.2% 12.3% 15.2% 27.5%

mnneso 3,615 13,121 2.5% 5.3% 7.8% 9.1% 3.2% 12.3%

msssspp 5,716 17,061 4.3% 13.9% 18.2% 14.2% 8.0% 22.1%

msso 10,372 24,334 12.0% 12.4% 24.4% 14.5% 13.8% 28.3%

monn 2,488 5,120 3.8% 11.8% 15.6% 7.8% 9.9% 17.7%

Nebsk 3,503 15,393 4.5% 2.5% 6.9% 18.1% 6.9% 24.9%

Ned 1,041 1,798 1.8% 15.9% 17.7% 2.2% 12.0% 14.2%

New hpse 1,298 2,429 8.7% 14.6% 23.3% 14.9% 18.3% 33.2%

New Jesey 2,371 6,554 10.1% 23.9% 34.0% 9.9% 26.2% 36.1%

New mexo 2,967 3,924 6.3% 6.4% 12.7% 7.8% 8.9% 16.7%

New Yok 7,460 17,420 9.0% 30.2% 39.3% 12.5% 27.1% 39.5%No con 16,976 18,165 12.2% 17.8% 30.0% 12.1% 18.1% 30.2%

No Dko 1,131 4,453 3.0% 2.8% 5.8% 16.8% 5.5% 22.3%

Oo 10,345 27,045 5.0% 19.5% 24.5% 9.1% 15.9% 25.0%

Oko 6,799 23,781 9.4% 9.1% 18.5% 22.6% 6.7% 29.4%

Oeon 2,706 7,633 3.4% 24.7% 28.0% 5.7% 17.6% 23.2%

Pennsyn 15,202 22,669 20.5% 19.1% 39.6% 24.4% 19.3% 43.7%

rode isnd 593 757 19.7% 33.6% 53.3% 20.6% 33.7% 54.3%

o con 8,395 9,271 11.1% 9.1% 20.3% 12.3% 9.1% 21.4%

o Dko 1,798 5,870 4.4% 5.5% 9.8% 20.6% 4.0% 24.6%

tennessee 8,196 19,985 3.6% 13.6% 17.2% 6.0% 13.4% 19.3%

texs 33,513 52,260 0.8% 11.6% 12.4% 2.6% 16.6% 19.2%

u 1,773 2,947 1.9% 14.3% 16.2% 4.3% 11.6% 15.9%

veon 1,084 2,727 7.9% 19.3% 27.2% 10.6% 23.6% 34.1%

vn 11,892 13,769 8.7% 16.9% 25.6% 9.1% 17.6% 26.7%

Wsnon 3,262 7,840 4.4% 27.3% 31.7% 4.7% 21.6% 26.3%

Wes vn 6,802 7,093 13.3% 22.4% 35.7% 13.4% 22.5% 35.9%

Wsonsn 5,165 14,057 3.1% 7.5% 10.6% 8.2% 5.5% 13.8%

Wyon 1,954 3,101 11.3% 6.2% 17.6% 13.7% 9.3% 23.0%

Peo ro 1,572 2,248 12.4% 45.1% 57.5% 12.5% 41.5% 54.0%

otal 283,356 607,380 7.0% 15.5% 22.6% 11.0% 14.0% 24.9%

Defciency Status o Bridges, 2012

Source: Authors Calculations of data from the U.S. Department of Transportation, Federal Highway Administration. Highway Bridge by Owner 2012. http://www.fhwa.dot.gov/bridge/owner.cfm


America's Infrastructure: Bridges

Documents

Transcript of America's Infrastructure: Bridges