Functionally obsolete 

1,072

Structurally deficient 

308

Aluminum, Wrought iron, or Cast iron

40

Concrete

1,299

Concrete continuous

132

Masonry

40

Prestressed concrete

375

Prestressed concrete continuous

70

Steel

2,198

Steel continuous

1,016

Wood or Timber

182

Other

10

Highway

5,291

Pedestrian-bicycle

1,119

Railroad

13

Second level (interchange)

21

Third level (interchange)

10

Fourth level (interchange)

1

Other

8

Highway

1,468

Pedestrian-bicycle

14

Railroad

431

Waterway

3,665

Waterway (relief)

3

Other

56

Arch - deck

202

Arch - thru

7

Box beam or Girders - multiple

194

Box beam or Girders - single or spread

34

Channel beam

5

Culvert

1,239

Frame

99

Girder and Floorbeam system

94

Movable - bascule

22

Movable - swing

3

Segmental box girder

1

Slab

468

Stringer / Multi-beam or Girder

2,683

Suspension

2

Tee beam

147

Truss - deck

8

Truss - thru

148

Other

6