Functionally obsolete 

2,212

Structurally deficient 

483

Aluminum, Wrought iron, or Cast iron

21

Concrete

679

Concrete continuous

177

Masonry

140

Prestressed concrete

961

Prestressed concrete continuous

146

Steel

2,396

Steel continuous

606

Wood or Timber

61

Other

8

Highway

5,175

Pedestrian-bicycle

2,303

Railroad

3

Second level (interchange)

17

Third level (interchange)

2

Other

1

Highway

1,866

Pedestrian-bicycle

28

Railroad

869

Waterway

2,535

Waterway (relief)

5

Other

117

Arch - deck

298

Arch - thru

9

Box beam or Girders - multiple

241

Box beam or Girders - single or spread

183

Channel beam

1

Culvert

311

Frame

137

Girder and Floorbeam system

113

Mixed types

3

Movable - bascule

18

Movable - lift

2

Movable - swing

6

Segmental box girder

59

Slab

595

Stayed girder

2

Stringer / Multi-beam or Girder

2,903

Suspension

1

Tee beam

208

Truss - deck

14

Truss - thru

87

Other

4