Website Statistics

All Bridges

Total listed bridges: 84,812
Bridges with photos: 54,232 (63.9%)
Bridges with Street View: 29,540 (34.8%)
Bridges with GPS coordinates: 84,179 (99.3%)
Total photos: 416,465

Extant Bridges

Extant bridges: 52,252 (61.6% of all)
Bridges with photos: 32,773 (62.7% of extant)
Bridges with Street View: 25,036 (47.9% of extant)
Bridges with GPS coordinates: 52,073 (99.7% of extant)

Lost Bridges

Lost bridges: 30,843 (36.4% of all)
Bridges with photos: 15,959 (51.7% of lost)
Bridges with GPS coordinates: 30,466 (98.8% of lost)

By Design

Arch: 12,626 (14.9%)
- Deck arch: 11,833 (14.0%)
  - Brick arch: 94 (0.1%)
  - Closed-spandrel arch: 4,091 (4.8%)
  - Corrugated multi-plate arch: 14 (0.02%)
  - Iron arch: 17 (0.02%)
  - Luten arch: 94 (0.1%)
  - Open-spandrel arch: 797 (0.9%)
  - Ribbed closed-spandrel arch: 30 (0.04%)
  - Steel arch: 398 (0.5%)
  - Stone arch: 3,260 (3.8%)
  - Timber arch: 19 (0.02%)
- Pony arch: 64 (0.08%)
  - Concrete pony arch: 52 (0.06%)
  - Timber pony arch: 7 (0.008%)
- Through arch: 448 (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: 220 (0.3%)
  - Timber through arch: 22 (0.03%)
Beam: 14,474 (17.1%)
- Stringer: 10,667 (12.6%)
  - Concrete stringer: 625 (0.7%)
  - Steel stringer: 6,009 (7.1%)
  - Timber stringer: 2,981 (3.5%)
- Concrete tee beam: 3,282 (3.9%)
Culvert: 1,442 (1.7%)
- Concrete culvert: 636 (0.7%)
- Stone culvert: 335 (0.4%)
Ferry: 208 (0.2%)
Floating: 41 (0.05%)
- Pontoon: 40 (0.05%)
Rigid frame: 746 (0.9%)
- Concrete rigid frame: 641 (0.8%)
- Steel rigid frame: 83 (0.10%)
Girder: 10,105 (11.9%)
- Deck girder: 5,287 (6.2%)
  - Concrete deck girder: 511 (0.6%)
  - Deck plate girder: 4,496 (5.3%)
- Pony/through girder: 3,930 (4.6%)
  - Concrete pony/through girder: 360 (0.4%)
  - Concrete curved chord through girder: 81 (0.10%)
  - Pony/through plate girder: 3,299 (3.9%)
Other: 956 (1.1%)
Slab: 2,099 (2.5%)
Suspension: 918 (1.1%)
- Eyebar suspension: 16 (0.02%)
- Self-anchor suspension: 5 (0.006%)
- Cable-stayed: 103 (0.1%)
- Wire suspension: 711 (0.8%)
Truss: 37,451 (44.2%)
- Bedstead pony truss: 538 (0.6%)
  - Bedstead double-intersection Warren pony truss: 70 (0.08%)
  - Bedstead Pratt pony truss: 359 (0.4%)
  - Bedstead Warren pony truss: 108 (0.1%)
- Deck truss: 1,804 (2.1%)
  - Deck arch-truss: 8 (0.009%)
  - Bailey deck truss: 5 (0.006%)
  - Baltimore deck truss: 36 (0.04%)
  - Canticrete deck truss: 2 (0.002%)
  - Double-intersection Warren deck truss: 88 (0.1%)
  - Fink deck truss: 7 (0.008%)
  - Howe deck truss: 64 (0.08%)
  - K-deck truss: 3 (0.004%)
  - Lattice deck truss: 33 (0.04%)
  - Lenticular deck truss: 4 (0.005%)
  - Other deck truss: 26 (0.03%)
  - Pegram deck truss: 2 (0.002%)
  - Pratt deck truss: 363 (0.4%)
  - Queenpost deck truss: 4 (0.005%)
  - Scissors deck truss: 1 (0.001%)
  - Warren deck truss: 587 (0.7%)
    - Warren deck truss with alternating verticals: 78 (0.09%)
    - Warren deck truss with no verticals: 5 (0.006%)
    - Warren deck truss with sub-panels: 9 (0.01%)
    - Warren deck truss with all verticals: 103 (0.1%)
  - Whipple deck truss: 25 (0.03%)
  - Wichert deck truss: 4 (0.005%)
- Half-through truss: 14 (0.02%)
  - Lenticular half-through truss: 1 (0.001%)
  - Pratt half-through truss: 7 (0.008%)
- Modern truss: 128 (0.2%)
  - Modern deck truss: 1 (0.001%)
  - Modern pony truss: 82 (0.10%)
    - Modern bowstring pony truss: 7 (0.008%)
    - Modern Parker pony truss: 5 (0.006%)
    - Modern polygonal Warren pony truss: 27 (0.03%)
    - Modern Pratt pony truss: 16 (0.02%)
    - Modern Warren pony truss: 19 (0.02%)
  - Modern through truss: 43 (0.05%)
    - Modern bowstring through truss: 3 (0.004%)
    - Modern polygonal Warren through truss: 11 (0.01%)
    - Modern Pratt through truss: 7 (0.008%)
    - Modern Warren through truss: 18 (0.02%)
- Pony truss: 16,269 (19.2%)
  - Bailey pony truss: 177 (0.2%)
  - Miller & Borcherding pony truss: 18 (0.02%)
  - Bowstring pony truss: 345 (0.4%)
  - Double-intersection Warren pony truss: 134 (0.2%)
  - Eiffel pony truss: 1 (0.001%)
  - Howe pony truss: 77 (0.09%)
  - Kingpost pony truss: 112 (0.1%)
  - Lane pony truss: 6 (0.007%)
  - Lattice pony truss: 27 (0.03%)
  - Lenticular pony truss: 99 (0.1%)
  - Other pony truss: 44 (0.05%)
  - Parker pony truss: 384 (0.5%)
  - Polygonal Warren pony truss: 687 (0.8%)
    - Polygonal Warren pony truss with alternating verticals: 218 (0.3%)
    - Polygonal Warren pony truss with no verticals: 13 (0.02%)
    - Polygonal Warren pony truss with all verticals: 72 (0.08%)
  - Post pony truss: 3 (0.004%)
  - Pratt pony truss: 2,929 (3.5%)
  - Half-hip Pratt pony truss: 585 (0.7%)
  - Queenpost pony truss: 174 (0.2%)
  - Truesdell pony truss: 20 (0.02%)
  - Vierendeel pony truss: 3 (0.004%)
  - Warren pony truss: 3,360 (4.0%)
    - Warren pony truss with alternating verticals: 780 (0.9%)
    - Warren pony truss with no verticals: 68 (0.08%)
    - Warren pony truss with all verticals: 480 (0.6%)
- Through truss: 18,289 (21.6%)
  - Baltimore through truss: 341 (0.4%)
  - Bollman through truss: 15 (0.02%)
  - Bowstring through truss: 348 (0.4%)
  - Brown through truss: 4 (0.005%)
  - Burr arch-truss: 774 (0.9%)
  - Camelback through truss: 398 (0.5%)
  - Childs through truss: 15 (0.02%)
  - Double-intersection Warren through truss: 184 (0.2%)
  - Eiffel through truss: 1 (0.001%)
  - Fink through truss: 10 (0.01%)
  - Hammond through truss: 9 (0.01%)
  - Haupt through truss: 9 (0.01%)
  - Howe through truss: 581 (0.7%)
  - Inverted bowstring through truss: 7 (0.008%)
  - K-Parker through truss: 73 (0.09%)
  - K-Truss through truss: 16 (0.02%)
  - Kingpost through truss: 88 (0.1%)
  - Lattice through truss: 766 (0.9%)
    - Quadrangular lattice through truss: 185 (0.2%)
    - Quintangular lattice through truss: 1 (0.001%)
    - Town lattice truss: 444 (0.5%)
    - Triple-intersection lattice through truss: 36 (0.04%)
  - Lenticular through truss: 89 (0.1%)
  - Lenticular Warren through truss: 5 (0.006%)
  - Long through truss: 73 (0.09%)
  - Multiple Kingpost through truss: 199 (0.2%)
  - Other through truss: 31 (0.04%)
  - Paddleford through truss: 62 (0.07%)
  - Parker through truss: 1,384 (1.6%)
  - Partridge through truss: 10 (0.01%)
  - Pegram through truss: 26 (0.03%)
  - Pennsylvania through truss: 583 (0.7%)
  - Polygonal Warren through truss: 463 (0.5%)
    - Polygonal Warren through truss with alternating verticals: 56 (0.07%)
    - Polygonal Warren through truss with no verticals: 4 (0.005%)
    - Polygonal Warren through truss with sub-panels: 17 (0.02%)
    - Polygonal Warren through truss with all verticals: 131 (0.2%)
  - Post through truss: 49 (0.06%)
  - Pratt through truss: 6,105 (7.2%)
  - Queenpost through truss: 201 (0.2%)
  - Smith through truss: 73 (0.09%)
  - Stearns through truss: 2 (0.002%)
  - Thacher through truss: 17 (0.02%)
  - Waddell "A" through truss: 7 (0.008%)
  - Warren through truss: 1,649 (1.9%)
    - Warren through truss with alternating verticals: 47 (0.06%)
    - Warren through truss with no verticals: 31 (0.04%)
    - Warren through truss with sub-panels: 75 (0.09%)
    - Warren through truss with all verticals: 444 (0.5%)
  - Wheeler through truss: 1 (0.001%)
  - Whipple through truss: 438 (0.5%)
Tunnel: 1,355 (1.6%)
Unknown: 2,391 (2.8%)

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