Website Statistics

All Bridges

Total listed bridges: 70,064
Bridges with photos: 39,800 (56.8%)
Bridges with Street View: 24,502 (35.0%)
Bridges with GPS coordinates: 68,730 (98.1%)
Total photos: 322,131

Extant Bridges

Extant bridges: 47,481 (67.8% of all)
Bridges with photos: 26,645 (56.1% of extant)
Bridges with Street View: 21,394 (45.1% of extant)
Bridges with GPS coordinates: 46,871 (98.7% of extant)

Lost Bridges

Lost bridges: 20,806 (29.7% of all)
Bridges with photos: 9,650 (46.4% of lost)
Bridges with GPS coordinates: 20,222 (97.2% of lost)

By Design

Arch: 11,307 (16.1%)
- Deck arch: 10,529 (15.0%)
  - Brick arch: 82 (0.1%)
  - Closed-spandrel arch: 3,532 (5.0%)
  - Corrugated multi-plate arch: 8 (0.01%)
  - Iron arch: 8 (0.01%)
  - Luten arch: 80 (0.1%)
  - Open-spandrel arch: 684 (1.0%)
  - Ribbed closed-spandrel arch: 28 (0.04%)
  - Steel arch: 341 (0.5%)
  - Stone arch: 2,691 (3.8%)
  - Timber arch: 10 (0.01%)
- Pony arch: 57 (0.08%)
  - Concrete pony arch: 44 (0.06%)
  - Timber pony arch: 7 (0.010%)
- Through arch: 414 (0.6%)
  - Concrete through arch: 117 (0.2%)
  - Iron through arch: 3 (0.004%)
  - Marsh arch: 48 (0.07%)
  - Network arch: 6 (0.009%)
  - Steel through arch: 203 (0.3%)
  - Timber through arch: 20 (0.03%)
Beam: 11,850 (16.9%)
- Stringer: 8,748 (12.5%)
  - Concrete stringer: 495 (0.7%)
  - Steel stringer: 4,776 (6.8%)
  - Timber stringer: 2,473 (3.5%)
- Concrete tee beam: 2,650 (3.8%)
Culvert: 1,150 (1.6%)
- Concrete culvert: 465 (0.7%)
- Stone culvert: 300 (0.4%)
Ferry: 147 (0.2%)
Floating: 33 (0.05%)
- Pontoon: 31 (0.04%)
Rigid frame: 579 (0.8%)
- Concrete rigid frame: 490 (0.7%)
- Steel rigid frame: 70 (0.10%)
Girder: 7,826 (11.2%)
- Deck girder: 3,996 (5.7%)
  - Concrete deck girder: 421 (0.6%)
  - Deck plate girder: 3,337 (4.8%)
- Pony/through girder: 2,986 (4.3%)
  - Concrete pony/through girder: 298 (0.4%)
  - Concrete curved chord through girder: 71 (0.1%)
  - Pony/through plate girder: 2,486 (3.5%)
Other: 934 (1.3%)
Slab: 1,671 (2.4%)
Suspension: 733 (1.0%)
- Eyebar suspension: 13 (0.02%)
- Self-anchor suspension: 4 (0.006%)
- Cable-stayed: 92 (0.1%)
- Wire suspension: 566 (0.8%)
Truss: 30,634 (43.7%)
- Bedstead pony truss: 501 (0.7%)
  - Bedstead double-intersection Warren pony truss: 69 (0.10%)
  - Bedstead Pratt pony truss: 330 (0.5%)
  - Bedstead Warren pony truss: 100 (0.1%)
- Deck truss: 1,424 (2.0%)
  - Deck arch-truss: 2 (0.003%)
  - Bailey deck truss: 5 (0.007%)
  - Baltimore deck truss: 26 (0.04%)
  - Canticrete deck truss: 2 (0.003%)
  - Double-intersection Warren deck truss: 76 (0.1%)
  - Fink deck truss: 6 (0.009%)
  - Howe deck truss: 34 (0.05%)
  - K-deck truss: 3 (0.004%)
  - Lattice deck truss: 29 (0.04%)
  - Lenticular deck truss: 4 (0.006%)
  - Other deck truss: 13 (0.02%)
  - Pegram deck truss: 2 (0.003%)
  - Pratt deck truss: 275 (0.4%)
  - Queenpost deck truss: 1 (0.001%)
  - Scissors deck truss: 1 (0.001%)
  - Warren deck truss: 493 (0.7%)
    - Warren deck truss with alternating verticals: 50 (0.07%)
    - Warren deck truss with no verticals: 1 (0.001%)
    - Warren deck truss with sub-panels: 6 (0.009%)
    - Warren deck truss with all verticals: 74 (0.1%)
  - Whipple deck truss: 20 (0.03%)
  - Wichert deck truss: 3 (0.004%)
- Half-through truss: 9 (0.01%)
  - Lenticular half-through truss: 1 (0.001%)
  - Pratt half-through truss: 5 (0.007%)
- Modern truss: 145 (0.2%)
  - Modern deck truss: 2 (0.003%)
  - Modern pony truss: 91 (0.1%)
    - Modern bowstring pony truss: 19 (0.03%)
    - Modern Parker pony truss: 6 (0.009%)
    - Modern polygonal Warren pony truss: 15 (0.02%)
    - Modern Pratt pony truss: 25 (0.04%)
    - 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 (0.03%)
- Pony truss: 14,573 (20.8%)
  - Bailey pony truss: 134 (0.2%)
  - Miller & Borcherding pony truss: 17 (0.02%)
  - Bowstring pony truss: 222 (0.3%)
  - Double-intersection Warren pony truss: 116 (0.2%)
  - Eiffel pony truss: 1 (0.001%)
  - Howe pony truss: 52 (0.07%)
  - Kingpost pony truss: 91 (0.1%)
  - Lane pony truss: 5 (0.007%)
  - Lattice pony truss: 20 (0.03%)
  - Lenticular pony truss: 69 (0.10%)
  - Other pony truss: 16 (0.02%)
  - Parker pony truss: 347 (0.5%)
  - Polygonal Warren pony truss: 566 (0.8%)
    - Polygonal Warren pony truss with alternating verticals: 139 (0.2%)
    - Polygonal Warren pony truss with no verticals: 9 (0.01%)
    - Polygonal Warren pony truss with all verticals: 44 (0.06%)
  - Post pony truss: 2 (0.003%)
  - Pratt pony truss: 2,460 (3.5%)
  - Half-hip Pratt pony truss: 405 (0.6%)
  - Queenpost pony truss: 111 (0.2%)
  - Truesdell pony truss: 7 (0.010%)
  - Vierendeel pony truss: 3 (0.004%)
  - Warren pony truss: 2,809 (4.0%)
    - Warren pony truss with alternating verticals: 518 (0.7%)
    - Warren pony truss with no verticals: 37 (0.05%)
    - Warren pony truss with all verticals: 323 (0.5%)
- Through truss: 13,559 (19.4%)
  - Baltimore through truss: 282 (0.4%)
  - Bollman through truss: 9 (0.01%)
  - Bowstring through truss: 216 (0.3%)
  - Brown through truss: 4 (0.006%)
  - Burr arch-truss: 298 (0.4%)
  - Camelback through truss: 303 (0.4%)
  - Childs through truss: 13 (0.02%)
  - Double-intersection Warren through truss: 161 (0.2%)
  - Eiffel through truss: 1 (0.001%)
  - Fink through truss: 5 (0.007%)
  - Hammond through truss: 5 (0.007%)
  - Haupt through truss: 5 (0.007%)
  - Howe through truss: 368 (0.5%)
  - Inverted bowstring through truss: 5 (0.007%)
  - K-Parker through truss: 66 (0.09%)
  - K-Truss through truss: 13 (0.02%)
  - Kingpost through truss: 52 (0.07%)
  - Lattice through truss: 476 (0.7%)
    - Quadrangular lattice through truss: 162 (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: 66 (0.09%)
  - Lenticular Warren through truss: 4 (0.006%)
  - Long through truss: 31 (0.04%)
  - Multiple Kingpost through truss: 131 (0.2%)
  - Other through truss: 24 (0.03%)
  - Paddleford through truss: 27 (0.04%)
  - Parker through truss: 1,175 (1.7%)
  - Partridge through truss: 8 (0.01%)
  - Pegram through truss: 22 (0.03%)
  - Pennsylvania through truss: 413 (0.6%)
  - Polygonal Warren through truss: 372 (0.5%)
    - Polygonal Warren through truss with alternating verticals: 34 (0.05%)
    - Polygonal Warren through truss with no verticals: 3 (0.004%)
    - Polygonal Warren through truss with sub-panels: 8 (0.01%)
    - Polygonal Warren through truss with all verticals: 88 (0.1%)
  - Post through truss: 34 (0.05%)
  - Pratt through truss: 4,666 (6.7%)
  - Queenpost through truss: 112 (0.2%)
  - Smith through truss: 33 (0.05%)
  - Stearns through truss: 2 (0.003%)
  - Thacher through truss: 12 (0.02%)
  - Waddell "A" through truss: 7 (0.010%)
  - Warren through truss: 1,455 (2.1%)
    - Warren through truss with alternating verticals: 34 (0.05%)
    - Warren through truss with no verticals: 21 (0.03%)
    - Warren through truss with sub-panels: 68 (0.10%)
    - Warren through truss with all verticals: 334 (0.5%)
  - Wheeler through truss: 1 (0.001%)
  - Whipple through truss: 280 (0.4%)
Tunnel: 1,069 (1.5%)
Unknown: 2,131 (3.0%)

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