Website Statistics

All Bridges

Total listed bridges: 72,102
Bridges with photos: 41,456 (57.5%)
Bridges with Street View: 25,263 (35.0%)
Bridges with GPS coordinates: 71,063 (98.6%)
Total photos: 335,340

Extant Bridges

Extant bridges: 47,982 (66.5% of all)
Bridges with photos: 28,455 (59.3% of extant)
Bridges with Street View: 21,991 (45.8% of extant)
Bridges with GPS coordinates: 47,629 (99.3% of extant)

Lost Bridges

Lost bridges: 22,287 (30.9% of all)
Bridges with photos: 11,329 (50.8% of lost)
Bridges with GPS coordinates: 21,730 (97.5% of lost)

By Design

Arch: 11,435 (15.9%)
- Deck arch: 10,665 (14.8%)
  - Brick arch: 87 (0.1%)
  - Closed-spandrel arch: 3,575 (5.0%)
  - Corrugated multi-plate arch: 12 (0.02%)
  - Iron arch: 10 (0.01%)
  - Luten arch: 84 (0.1%)
  - Open-spandrel arch: 691 (1.0%)
  - Ribbed closed-spandrel arch: 29 (0.04%)
  - Steel arch: 353 (0.5%)
  - Stone arch: 2,743 (3.8%)
  - Timber arch: 12 (0.02%)
- Pony arch: 59 (0.08%)
  - Concrete pony arch: 46 (0.06%)
  - Timber pony arch: 7 (0.010%)
- Through arch: 415 (0.6%)
  - Concrete through arch: 117 (0.2%)
  - Iron through arch: 3 (0.004%)
  - Marsh arch: 47 (0.07%)
  - Network arch: 6 (0.008%)
  - Steel through arch: 203 (0.3%)
  - Timber through arch: 21 (0.03%)
Beam: 12,550 (17.4%)
- Stringer: 9,174 (12.7%)
  - Concrete stringer: 514 (0.7%)
  - Steel stringer: 5,008 (6.9%)
  - Timber stringer: 2,611 (3.6%)
- Concrete tee beam: 2,890 (4.0%)
Culvert: 1,227 (1.7%)
- Concrete culvert: 502 (0.7%)
- Stone culvert: 306 (0.4%)
Ferry: 154 (0.2%)
Floating: 33 (0.05%)
- Pontoon: 31 (0.04%)
Rigid frame: 608 (0.8%)
- Concrete rigid frame: 517 (0.7%)
- Steel rigid frame: 72 (0.10%)
Girder: 8,097 (11.2%)
- Deck girder: 4,126 (5.7%)
  - Concrete deck girder: 428 (0.6%)
  - Deck plate girder: 3,453 (4.8%)
- Pony/through girder: 3,084 (4.3%)
  - Concrete pony/through girder: 316 (0.4%)
  - Concrete curved chord through girder: 72 (0.10%)
  - Pony/through plate girder: 2,561 (3.6%)
Other: 961 (1.3%)
Slab: 1,765 (2.4%)
Suspension: 754 (1.0%)
- Eyebar suspension: 14 (0.02%)
- Self-anchor suspension: 4 (0.006%)
- Cable-stayed: 94 (0.1%)
- Wire suspension: 584 (0.8%)
Truss: 31,272 (43.4%)
- Bedstead pony truss: 512 (0.7%)
  - Bedstead double-intersection Warren pony truss: 69 (0.10%)
  - Bedstead Pratt pony truss: 339 (0.5%)
  - Bedstead Warren pony truss: 103 (0.1%)
- Deck truss: 1,447 (2.0%)
  - Deck arch-truss: 3 (0.004%)
  - Bailey deck truss: 5 (0.007%)
  - Baltimore deck truss: 27 (0.04%)
  - Canticrete deck truss: 2 (0.003%)
  - Double-intersection Warren deck truss: 77 (0.1%)
  - Fink deck truss: 7 (0.010%)
  - Howe deck truss: 35 (0.05%)
  - K-deck truss: 3 (0.004%)
  - Lattice deck truss: 29 (0.04%)
  - Lenticular deck truss: 4 (0.006%)
  - Other deck truss: 16 (0.02%)
  - Pegram deck truss: 2 (0.003%)
  - Pratt deck truss: 279 (0.4%)
  - Queenpost deck truss: 1 (0.001%)
  - Scissors deck truss: 1 (0.001%)
  - Warren deck truss: 497 (0.7%)
    - Warren deck truss with alternating verticals: 51 (0.07%)
    - Warren deck truss with no verticals: 1 (0.001%)
    - Warren deck truss with sub-panels: 6 (0.008%)
    - Warren deck truss with all verticals: 76 (0.1%)
  - Whipple deck truss: 20 (0.03%)
  - Wichert deck truss: 3 (0.004%)
- Half-through truss: 10 (0.01%)
  - Lenticular half-through truss: 1 (0.001%)
  - Pratt half-through truss: 6 (0.008%)
- Modern truss: 146 (0.2%)
  - Modern deck truss: 2 (0.003%)
  - Modern pony truss: 92 (0.1%)
    - Modern bowstring pony truss: 19 (0.03%)
    - Modern Parker pony truss: 6 (0.008%)
    - Modern polygonal Warren pony truss: 16 (0.02%)
    - Modern Pratt pony truss: 25 (0.03%)
    - Modern Warren pony truss: 16 (0.02%)
  - Modern through truss: 49 (0.07%)
    - Modern bowstring through truss: 10 (0.01%)
    - Modern polygonal Warren through truss: 7 (0.010%)
    - Modern Pratt through truss: 8 (0.01%)
    - Modern Warren through truss: 18 (0.02%)
- Pony truss: 14,796 (20.5%)
  - Bailey pony truss: 146 (0.2%)
  - Miller & Borcherding pony truss: 18 (0.02%)
  - Bowstring pony truss: 230 (0.3%)
  - Double-intersection Warren pony truss: 119 (0.2%)
  - Eiffel pony truss: 1 (0.001%)
  - Howe pony truss: 55 (0.08%)
  - Kingpost pony truss: 92 (0.1%)
  - Lane pony truss: 5 (0.007%)
  - Lattice pony truss: 22 (0.03%)
  - Lenticular pony truss: 69 (0.10%)
  - Other pony truss: 16 (0.02%)
  - Parker pony truss: 355 (0.5%)
  - Polygonal Warren pony truss: 573 (0.8%)
    - Polygonal Warren pony truss with alternating verticals: 143 (0.2%)
    - Polygonal Warren pony truss with no verticals: 9 (0.01%)
    - Polygonal Warren pony truss with all verticals: 50 (0.07%)
  - Post pony truss: 2 (0.003%)
  - Pratt pony truss: 2,564 (3.6%)
  - Half-hip Pratt pony truss: 449 (0.6%)
  - Queenpost pony truss: 116 (0.2%)
  - Truesdell pony truss: 7 (0.010%)
  - Vierendeel pony truss: 3 (0.004%)
  - Warren pony truss: 2,986 (4.1%)
    - Warren pony truss with alternating verticals: 586 (0.8%)
    - Warren pony truss with no verticals: 40 (0.06%)
    - Warren pony truss with all verticals: 404 (0.6%)
- Through truss: 13,999 (19.4%)
  - Baltimore through truss: 288 (0.4%)
  - Bollman through truss: 9 (0.01%)
  - Bowstring through truss: 231 (0.3%)
  - Brown through truss: 4 (0.006%)
  - Burr arch-truss: 334 (0.5%)
  - Camelback through truss: 318 (0.4%)
  - Childs through truss: 13 (0.02%)
  - Double-intersection Warren through truss: 163 (0.2%)
  - Eiffel through truss: 1 (0.001%)
  - Fink through truss: 6 (0.008%)
  - Hammond through truss: 7 (0.010%)
  - Haupt through truss: 5 (0.007%)
  - Howe through truss: 407 (0.6%)
  - Inverted bowstring through truss: 5 (0.007%)
  - K-Parker through truss: 66 (0.09%)
  - K-Truss through truss: 13 (0.02%)
  - Kingpost through truss: 53 (0.07%)
  - Lattice through truss: 479 (0.7%)
    - Quadrangular lattice through truss: 165 (0.2%)
    - Quintangular lattice through truss: 1 (0.001%)
    - Town lattice truss: 226 (0.3%)
    - Triple-intersection lattice through truss: 27 (0.04%)
  - Lenticular through truss: 67 (0.09%)
  - Lenticular Warren through truss: 4 (0.006%)
  - Long through truss: 33 (0.05%)
  - Multiple Kingpost through truss: 139 (0.2%)
  - Other through truss: 26 (0.04%)
  - Paddleford through truss: 27 (0.04%)
  - Parker through truss: 1,200 (1.7%)
  - Partridge through truss: 9 (0.01%)
  - Pegram through truss: 22 (0.03%)
  - Pennsylvania through truss: 425 (0.6%)
  - Polygonal Warren through truss: 383 (0.5%)
    - Polygonal Warren through truss with alternating verticals: 35 (0.05%)
    - Polygonal Warren through truss with no verticals: 3 (0.004%)
    - Polygonal Warren through truss with sub-panels: 11 (0.02%)
    - Polygonal Warren through truss with all verticals: 92 (0.1%)
  - Post through truss: 35 (0.05%)
  - Pratt through truss: 4,857 (6.7%)
  - Queenpost through truss: 113 (0.2%)
  - Smith through truss: 36 (0.05%)
  - Stearns through truss: 2 (0.003%)
  - Thacher through truss: 13 (0.02%)
  - Waddell "A" through truss: 7 (0.010%)
  - Warren through truss: 1,481 (2.1%)
    - Warren through truss with alternating verticals: 37 (0.05%)
    - Warren through truss with no verticals: 22 (0.03%)
    - Warren through truss with sub-panels: 68 (0.09%)
    - Warren through truss with all verticals: 350 (0.5%)
  - Wheeler through truss: 1 (0.001%)
  - Whipple through truss: 304 (0.4%)
Tunnel: 1,094 (1.5%)
Unknown: 2,152 (3.0%)

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