Website Statistics

All Bridges

Total listed bridges: 76,564
Bridges with photos: 46,175 (60.3%)
Bridges with Street View: 26,677 (34.8%)
Bridges with GPS coordinates: 75,751 (98.9%)
Total photos: 363,388

Extant Bridges

Extant bridges: 50,255 (65.6% of all)
Bridges with photos: 30,626 (60.9% of extant)
Bridges with Street View: 23,191 (46.1% of extant)
Bridges with GPS coordinates: 49,995 (99.5% of extant)

Lost Bridges

Lost bridges: 24,639 (32.2% of all)
Bridges with photos: 13,120 (53.2% of lost)
Bridges with GPS coordinates: 24,182 (98.1% of lost)

By Design

Arch: 11,957 (15.6%)
- Deck arch: 11,173 (14.6%)
  - Brick arch: 91 (0.1%)
  - Closed-spandrel arch: 3,760 (4.9%)
  - Corrugated multi-plate arch: 13 (0.02%)
  - Iron arch: 13 (0.02%)
  - Luten arch: 86 (0.1%)
  - Open-spandrel arch: 735 (1.0%)
  - Ribbed closed-spandrel arch: 29 (0.04%)
  - Steel arch: 370 (0.5%)
  - Stone arch: 3,000 (3.9%)
  - Timber arch: 14 (0.02%)
- Pony arch: 60 (0.08%)
  - Concrete pony arch: 47 (0.06%)
  - Timber pony arch: 7 (0.009%)
- Through arch: 435 (0.6%)
  - Concrete through arch: 119 (0.2%)
  - Iron through arch: 3 (0.004%)
  - Marsh arch: 50 (0.07%)
  - Network arch: 9 (0.01%)
  - Steel through arch: 215 (0.3%)
  - Timber through arch: 21 (0.03%)
Beam: 13,485 (17.6%)
- Stringer: 9,877 (12.9%)
  - Concrete stringer: 590 (0.8%)
  - Steel stringer: 5,487 (7.2%)
  - Timber stringer: 2,726 (3.6%)
- Concrete tee beam: 3,092 (4.0%)
Culvert: 1,344 (1.8%)
- Concrete culvert: 570 (0.7%)
- Stone culvert: 320 (0.4%)
Ferry: 174 (0.2%)
Floating: 34 (0.04%)
- Pontoon: 32 (0.04%)
Rigid frame: 679 (0.9%)
- Concrete rigid frame: 583 (0.8%)
- Steel rigid frame: 77 (0.1%)
Girder: 9,053 (11.8%)
- Deck girder: 4,712 (6.2%)
  - Concrete deck girder: 478 (0.6%)
  - Deck plate girder: 3,975 (5.2%)
- Pony/through girder: 3,463 (4.5%)
  - Concrete pony/through girder: 326 (0.4%)
  - Concrete curved chord through girder: 73 (0.10%)
  - Pony/through plate girder: 2,904 (3.8%)
Other: 959 (1.3%)
Slab: 1,904 (2.5%)
Suspension: 792 (1.0%)
- Eyebar suspension: 14 (0.02%)
- Self-anchor suspension: 4 (0.005%)
- Cable-stayed: 94 (0.1%)
- Wire suspension: 616 (0.8%)
Truss: 32,765 (42.8%)
- Bedstead pony truss: 521 (0.7%)
  - Bedstead double-intersection Warren pony truss: 69 (0.09%)
  - Bedstead Pratt pony truss: 346 (0.5%)
  - Bedstead Warren pony truss: 105 (0.1%)
- Deck truss: 1,545 (2.0%)
  - Deck arch-truss: 4 (0.005%)
  - Bailey deck truss: 5 (0.007%)
  - Baltimore deck truss: 27 (0.04%)
  - Canticrete deck truss: 2 (0.003%)
  - Double-intersection Warren deck truss: 80 (0.1%)
  - Fink deck truss: 7 (0.009%)
  - Howe deck truss: 44 (0.06%)
  - K-deck truss: 3 (0.004%)
  - Lattice deck truss: 28 (0.04%)
  - Lenticular deck truss: 4 (0.005%)
  - Other deck truss: 20 (0.03%)
  - Pegram deck truss: 2 (0.003%)
  - Pratt deck truss: 296 (0.4%)
  - Queenpost deck truss: 2 (0.003%)
  - Scissors deck truss: 1 (0.001%)
  - Warren deck truss: 518 (0.7%)
    - Warren deck truss with alternating verticals: 57 (0.07%)
    - Warren deck truss with no verticals: 3 (0.004%)
    - Warren deck truss with sub-panels: 6 (0.008%)
    - Warren deck truss with all verticals: 81 (0.1%)
  - Whipple deck truss: 21 (0.03%)
  - Wichert deck truss: 3 (0.004%)
- Half-through truss: 12 (0.02%)
  - Lenticular half-through truss: 1 (0.001%)
  - Pratt half-through truss: 6 (0.008%)
- Modern truss: 161 (0.2%)
  - Modern deck truss: 2 (0.003%)
  - Modern pony truss: 104 (0.1%)
    - Modern bowstring pony truss: 20 (0.03%)
    - Modern Parker pony truss: 6 (0.008%)
    - Modern polygonal Warren pony truss: 16 (0.02%)
    - Modern Pratt pony truss: 34 (0.04%)
    - Modern Warren pony truss: 17 (0.02%)
  - Modern through truss: 52 (0.07%)
    - Modern bowstring through truss: 11 (0.01%)
    - Modern polygonal Warren through truss: 7 (0.009%)
    - Modern Pratt through truss: 9 (0.01%)
    - Modern Warren through truss: 19 (0.02%)
- Pony truss: 15,204 (19.9%)
  - Bailey pony truss: 161 (0.2%)
  - Miller & Borcherding pony truss: 18 (0.02%)
  - Bowstring pony truss: 257 (0.3%)
  - Double-intersection Warren pony truss: 120 (0.2%)
  - Eiffel pony truss: 1 (0.001%)
  - Howe pony truss: 59 (0.08%)
  - Kingpost pony truss: 94 (0.1%)
  - Lane pony truss: 6 (0.008%)
  - Lattice pony truss: 22 (0.03%)
  - Lenticular pony truss: 79 (0.1%)
  - Other pony truss: 17 (0.02%)
  - Parker pony truss: 368 (0.5%)
  - Polygonal Warren pony truss: 605 (0.8%)
    - Polygonal Warren pony truss with alternating verticals: 166 (0.2%)
    - Polygonal Warren pony truss with no verticals: 10 (0.01%)
    - Polygonal Warren pony truss with all verticals: 58 (0.08%)
  - Post pony truss: 3 (0.004%)
  - Pratt pony truss: 2,658 (3.5%)
  - Half-hip Pratt pony truss: 480 (0.6%)
  - Queenpost pony truss: 141 (0.2%)
  - Truesdell pony truss: 7 (0.009%)
  - Vierendeel pony truss: 3 (0.004%)
  - Warren pony truss: 3,127 (4.1%)
    - Warren pony truss with alternating verticals: 650 (0.8%)
    - Warren pony truss with no verticals: 48 (0.06%)
    - Warren pony truss with all verticals: 443 (0.6%)
- Through truss: 14,978 (19.6%)
  - Baltimore through truss: 312 (0.4%)
  - Bollman through truss: 13 (0.02%)
  - Bowstring through truss: 267 (0.3%)
  - Brown through truss: 4 (0.005%)
  - Burr arch-truss: 351 (0.5%)
  - Camelback through truss: 350 (0.5%)
  - Childs through truss: 13 (0.02%)
  - Double-intersection Warren through truss: 166 (0.2%)
  - Eiffel through truss: 1 (0.001%)
  - Fink through truss: 8 (0.01%)
  - Hammond through truss: 7 (0.009%)
  - Haupt through truss: 5 (0.007%)
  - Howe through truss: 433 (0.6%)
  - Inverted bowstring through truss: 6 (0.008%)
  - K-Parker through truss: 68 (0.09%)
  - K-Truss through truss: 14 (0.02%)
  - Kingpost through truss: 54 (0.07%)
  - Lattice through truss: 548 (0.7%)
    - Quadrangular lattice through truss: 176 (0.2%)
    - Quintangular lattice through truss: 1 (0.001%)
    - Town lattice truss: 259 (0.3%)
    - Triple-intersection lattice through truss: 33 (0.04%)
  - Lenticular through truss: 73 (0.10%)
  - Lenticular Warren through truss: 4 (0.005%)
  - Long through truss: 34 (0.04%)
  - Multiple Kingpost through truss: 143 (0.2%)
  - Other through truss: 27 (0.04%)
  - Paddleford through truss: 27 (0.04%)
  - Parker through truss: 1,262 (1.6%)
  - Partridge through truss: 9 (0.01%)
  - Pegram through truss: 23 (0.03%)
  - Pennsylvania through truss: 475 (0.6%)
  - Polygonal Warren through truss: 417 (0.5%)
    - Polygonal Warren through truss with alternating verticals: 46 (0.06%)
    - Polygonal Warren through truss with no verticals: 3 (0.004%)
    - Polygonal Warren through truss with sub-panels: 12 (0.02%)
    - Polygonal Warren through truss with all verticals: 104 (0.1%)
  - Post through truss: 42 (0.05%)
  - Pratt through truss: 5,203 (6.8%)
  - Queenpost through truss: 115 (0.2%)
  - Smith through truss: 41 (0.05%)
  - Stearns through truss: 2 (0.003%)
  - Thacher through truss: 14 (0.02%)
  - Waddell "A" through truss: 7 (0.009%)
  - Warren through truss: 1,539 (2.0%)
    - Warren through truss with alternating verticals: 41 (0.05%)
    - Warren through truss with no verticals: 26 (0.03%)
    - Warren through truss with sub-panels: 69 (0.09%)
    - Warren through truss with all verticals: 382 (0.5%)
  - Wheeler through truss: 1 (0.001%)
  - Whipple through truss: 352 (0.5%)
Tunnel: 1,295 (1.7%)
Unknown: 2,123 (2.8%)

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