Functionally obsolete 

1,229

Structurally deficient 

2,098

Aluminum, Wrought iron, or Cast iron

25

Concrete

9,390

Concrete continuous

463

Masonry

3

Prestressed concrete

3,588

Prestressed concrete continuous

1,168

Steel

1,410

Steel continuous

291

Wood or Timber

810

Other

7

Highway

17,099

Pedestrian-bicycle

129

Railroad

43

Second level (interchange)

3

Third level (interchange)

1

Other

1

Highway

1,346

Pedestrian-bicycle

2

Railroad

394

Waterway

14,714

Waterway (relief)

856

Other

22

Arch - deck

25

Arch - thru

1

Box beam or Girders - multiple

72

Box beam or Girders - single or spread

290

Channel beam

4,858

Culvert

3,747

Frame

66

Girder and Floorbeam system

95

Movable - bascule

5

Movable - lift

2

Movable - swing

3

Segmental box girder

7

Slab

715

Stayed girder

1

Stringer / Multi-beam or Girder

7,008

Tee beam

155

Truss - thru

57

Other

48