Functionally obsolete 

2,004

Structurally deficient 

811

Aluminum, Wrought iron, or Cast iron

31

Concrete

7,267

Concrete continuous

214

Masonry

13

Prestressed concrete

136

Prestressed concrete continuous

54

Steel

3,503

Steel continuous

1,498

Wood or Timber

270

Other

10

Building or plaza

3

Highway

12,697

Pedestrian-bicycle

74

Railroad

95

Second level (interchange)

171

Third level (interchange)

4

Other

3

Highway

1,069

Pedestrian-bicycle

1

Railroad

280

Waterway

11,780

Waterway (relief)

144

Other

9

Arch - deck

74

Arch - thru

7

Box beam or Girders - multiple

73

Box beam or Girders - single or spread

4

Channel beam

2,101

Culvert

3,319

Frame

16

Girder and Floorbeam system

69

Orthotropic

428

Slab

1,877

Stayed girder

1

Stringer / Multi-beam or Girder

4,361

Suspension

2

Tee beam

560

Truss - deck

5

Truss - thru

93

Other

6