Functionally obsolete 

1,684

Structurally deficient 

609

Aluminum, Wrought iron, or Cast iron

32

Concrete

1,125

Concrete continuous

119

Masonry

64

Prestressed concrete

1,511

Prestressed concrete continuous

42

Steel

3,106

Steel continuous

482

Wood or Timber

245

Other

11

Highway

6,567

Pedestrian-bicycle

3,110

Railroad

11

Second level (interchange)

164

Third level (interchange)

4

Other

2

Highway

2,494

Pedestrian-bicycle

15

Railroad

581

Waterway

3,825

Waterway (relief)

11

Other

144

Arch - deck

279

Arch - thru

1

Box beam or Girders - multiple

573

Box beam or Girders - single or spread

45

Channel beam

1

Culvert

587

Frame

154

Girder and Floorbeam system

195

Mixed types

1

Movable - bascule

28

Movable - lift

14

Movable - swing

8

Orthotropic

1

Segmental box girder

2

Slab

786

Stringer / Multi-beam or Girder

3,797

Suspension

2

Tee beam

80

Truss - deck

6

Truss - thru

169

Other

8