Functionally obsolete 

1,072

Structurally deficient 

338

Aluminum, Wrought iron, or Cast iron

8

Concrete

757

Concrete continuous

255

Masonry

45

Prestressed concrete

828

Prestressed concrete continuous

40

Steel

1,861

Steel continuous

473

Wood or Timber

44

Other

4

Building or plaza

1

Highway

4,162

Pedestrian-bicycle

1,241

Railroad

83

Second level (interchange)

41

Third level (interchange)

9

Fourth level (interchange)

2

Other

1

Highway

1,701

Pedestrian-bicycle

10

Railroad

374

Waterway

2,415

Waterway (relief)

7

Other

39

Arch - deck

172

Arch - thru

1

Box beam or Girders - multiple

291

Box beam or Girders - single or spread

85

Channel beam

9

Culvert

621

Frame

147

Girder and Floorbeam system

99

Movable - bascule

7

Movable - lift

2

Movable - swing

4

Orthotropic

3

Segmental box girder

2

Slab

517

Stringer / Multi-beam or Girder

2,189

Tee beam

119

Truss - deck

4

Truss - thru

37

Other

6