Website Statistics

All Bridges

Total listed bridges: 81,634
Bridges with photos: 51,392 (63.0%)
Bridges with Street View: 28,410 (34.8%)
Bridges with GPS coordinates: 80,965 (99.2%)
Total photos: 402,510

Extant Bridges

Extant bridges: 51,795 (63.4% of all)
Bridges with photos: 32,863 (63.4% of extant)
Bridges with Street View: 24,581 (47.5% of extant)
Bridges with GPS coordinates: 51,604 (99.6% of extant)

Lost Bridges

Lost bridges: 28,186 (34.5% of all)
Bridges with photos: 15,851 (56.2% of lost)
Bridges with GPS coordinates: 27,788 (98.6% of lost)

By Design

Arch: 12,470 (15.3%)
- Deck arch: 11,688 (14.3%)
  - Brick arch: 92 (0.1%)
  - Closed-spandrel arch: 4,022 (4.9%)
  - Corrugated multi-plate arch: 14 (0.02%)
  - Iron arch: 17 (0.02%)
  - Luten arch: 94 (0.1%)
  - Open-spandrel arch: 777 (1.0%)
  - Ribbed closed-spandrel arch: 29 (0.04%)
  - Steel arch: 393 (0.5%)
  - Stone arch: 3,205 (3.9%)
  - Timber arch: 18 (0.02%)
- Pony arch: 62 (0.08%)
  - Concrete pony arch: 50 (0.06%)
  - Timber pony arch: 7 (0.009%)
- Through arch: 442 (0.5%)
  - Concrete through arch: 119 (0.1%)
  - Iron through arch: 3 (0.004%)
  - Marsh arch: 56 (0.07%)
  - Network arch: 10 (0.01%)
  - Steel through arch: 215 (0.3%)
  - Timber through arch: 21 (0.03%)
Beam: 14,282 (17.5%)
- Stringer: 10,511 (12.9%)
  - Concrete stringer: 622 (0.8%)
  - Steel stringer: 5,901 (7.2%)
  - Timber stringer: 2,915 (3.6%)
- Concrete tee beam: 3,230 (4.0%)
Culvert: 1,427 (1.7%)
- Concrete culvert: 626 (0.8%)
- Stone culvert: 332 (0.4%)
Ferry: 200 (0.2%)
Floating: 40 (0.05%)
- Pontoon: 38 (0.05%)
Rigid frame: 736 (0.9%)
- Concrete rigid frame: 633 (0.8%)
- Steel rigid frame: 81 (0.10%)
Girder: 9,810 (12.0%)
- Deck girder: 5,133 (6.3%)
  - Concrete deck girder: 502 (0.6%)
  - Deck plate girder: 4,358 (5.3%)
- Pony/through girder: 3,794 (4.6%)
  - Concrete pony/through girder: 356 (0.4%)
  - Concrete curved chord through girder: 80 (0.10%)
  - Pony/through plate girder: 3,171 (3.9%)
Other: 954 (1.2%)
Slab: 2,047 (2.5%)
Suspension: 876 (1.1%)
- Eyebar suspension: 15 (0.02%)
- Self-anchor suspension: 5 (0.006%)
- Cable-stayed: 99 (0.1%)
- Wire suspension: 687 (0.8%)
Truss: 35,189 (43.1%)
- Bedstead pony truss: 532 (0.7%)
  - Bedstead double-intersection Warren pony truss: 70 (0.09%)
  - Bedstead Pratt pony truss: 355 (0.4%)
  - Bedstead Warren pony truss: 106 (0.1%)
- Deck truss: 1,723 (2.1%)
  - Deck arch-truss: 7 (0.009%)
  - Bailey deck truss: 5 (0.006%)
  - Baltimore deck truss: 32 (0.04%)
  - Canticrete deck truss: 2 (0.002%)
  - Double-intersection Warren deck truss: 88 (0.1%)
  - Fink deck truss: 7 (0.009%)
  - Howe deck truss: 53 (0.06%)
  - K-deck truss: 3 (0.004%)
  - Lattice deck truss: 31 (0.04%)
  - Lenticular deck truss: 4 (0.005%)
  - Other deck truss: 23 (0.03%)
  - Pegram deck truss: 2 (0.002%)
  - Pratt deck truss: 335 (0.4%)
  - Queenpost deck truss: 3 (0.004%)
  - Scissors deck truss: 1 (0.001%)
  - Warren deck truss: 577 (0.7%)
    - Warren deck truss with alternating verticals: 73 (0.09%)
    - Warren deck truss with no verticals: 5 (0.006%)
    - Warren deck truss with sub-panels: 8 (0.010%)
    - Warren deck truss with all verticals: 97 (0.1%)
  - Whipple deck truss: 24 (0.03%)
  - Wichert deck truss: 3 (0.004%)
- Half-through truss: 14 (0.02%)
  - Lenticular half-through truss: 1 (0.001%)
  - Pratt half-through truss: 7 (0.009%)
- Modern truss: 124 (0.2%)
  - Modern deck truss: 1 (0.001%)
  - Modern pony truss: 79 (0.10%)
    - Modern bowstring pony truss: 7 (0.009%)
    - Modern Parker pony truss: 5 (0.006%)
    - Modern polygonal Warren pony truss: 23 (0.03%)
    - Modern Pratt pony truss: 16 (0.02%)
    - Modern Warren pony truss: 19 (0.02%)
  - Modern through truss: 42 (0.05%)
    - Modern bowstring through truss: 3 (0.004%)
    - Modern polygonal Warren through truss: 10 (0.01%)
    - Modern Pratt through truss: 7 (0.009%)
    - Modern Warren through truss: 18 (0.02%)
- Pony truss: 15,891 (19.5%)
  - Bailey pony truss: 173 (0.2%)
  - Miller & Borcherding pony truss: 18 (0.02%)
  - Bowstring pony truss: 322 (0.4%)
  - Double-intersection Warren pony truss: 133 (0.2%)
  - Eiffel pony truss: 1 (0.001%)
  - Howe pony truss: 71 (0.09%)
  - Kingpost pony truss: 106 (0.1%)
  - Lane pony truss: 6 (0.007%)
  - Lattice pony truss: 23 (0.03%)
  - Lenticular pony truss: 96 (0.1%)
  - Other pony truss: 17 (0.02%)
  - Parker pony truss: 382 (0.5%)
  - Polygonal Warren pony truss: 652 (0.8%)
    - Polygonal Warren pony truss with alternating verticals: 200 (0.2%)
    - Polygonal Warren pony truss with no verticals: 13 (0.02%)
    - Polygonal Warren pony truss with all verticals: 66 (0.08%)
  - Post pony truss: 3 (0.004%)
  - Pratt pony truss: 2,854 (3.5%)
  - Half-hip Pratt pony truss: 532 (0.7%)
  - Queenpost pony truss: 163 (0.2%)
  - Truesdell pony truss: 20 (0.02%)
  - Vierendeel pony truss: 3 (0.004%)
  - Warren pony truss: 3,306 (4.0%)
    - Warren pony truss with alternating verticals: 748 (0.9%)
    - Warren pony truss with no verticals: 63 (0.08%)
    - Warren pony truss with all verticals: 468 (0.6%)
- Through truss: 16,525 (20.2%)
  - Baltimore through truss: 335 (0.4%)
  - Bollman through truss: 14 (0.02%)
  - Bowstring through truss: 316 (0.4%)
  - Brown through truss: 4 (0.005%)
  - Burr arch-truss: 392 (0.5%)
  - Camelback through truss: 385 (0.5%)
  - Childs through truss: 14 (0.02%)
  - Double-intersection Warren through truss: 178 (0.2%)
  - Eiffel through truss: 1 (0.001%)
  - Fink through truss: 8 (0.010%)
  - Hammond through truss: 9 (0.01%)
  - Haupt through truss: 5 (0.006%)
  - Howe through truss: 490 (0.6%)
  - Inverted bowstring through truss: 7 (0.009%)
  - K-Parker through truss: 73 (0.09%)
  - K-Truss through truss: 15 (0.02%)
  - Kingpost through truss: 64 (0.08%)
  - Lattice through truss: 621 (0.8%)
    - Quadrangular lattice through truss: 184 (0.2%)
    - Quintangular lattice through truss: 1 (0.001%)
    - Town lattice truss: 301 (0.4%)
    - Triple-intersection lattice through truss: 35 (0.04%)
  - Lenticular through truss: 85 (0.1%)
  - Lenticular Warren through truss: 5 (0.006%)
  - Long through truss: 41 (0.05%)
  - Multiple Kingpost through truss: 148 (0.2%)
  - Other through truss: 26 (0.03%)
  - Paddleford through truss: 29 (0.04%)
  - Parker through truss: 1,349 (1.7%)
  - Partridge through truss: 10 (0.01%)
  - Pegram through truss: 26 (0.03%)
  - Pennsylvania through truss: 552 (0.7%)
  - Polygonal Warren through truss: 453 (0.6%)
    - Polygonal Warren through truss with alternating verticals: 54 (0.07%)
    - Polygonal Warren through truss with no verticals: 4 (0.005%)
    - Polygonal Warren through truss with sub-panels: 15 (0.02%)
    - Polygonal Warren through truss with all verticals: 123 (0.2%)
  - Post through truss: 46 (0.06%)
  - Pratt through truss: 5,815 (7.1%)
  - Queenpost through truss: 115 (0.1%)
  - Smith through truss: 52 (0.06%)
  - Stearns through truss: 2 (0.002%)
  - Thacher through truss: 17 (0.02%)
  - Waddell "A" through truss: 7 (0.009%)
  - Warren through truss: 1,621 (2.0%)
    - Warren through truss with alternating verticals: 47 (0.06%)
    - Warren through truss with no verticals: 27 (0.03%)
    - Warren through truss with sub-panels: 74 (0.09%)
    - Warren through truss with all verticals: 419 (0.5%)
  - Wheeler through truss: 1 (0.001%)
  - Whipple through truss: 410 (0.5%)
Tunnel: 1,350 (1.7%)
Unknown: 2,253 (2.8%)

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