Website Statistics

All Bridges

Total listed bridges: 68,119
Bridges with photos: 38,271 (56.2%)
Bridges with Street View: 23,715 (34.8%)
Bridges with GPS coordinates: 66,852 (98.1%)
Total photos: 310,921

Extant Bridges

Extant bridges: 46,591 (68.4% of all)
Bridges with photos: 26,708 (57.3% of extant)
Bridges with Street View: 20,760 (44.6% of extant)
Bridges with GPS coordinates: 45,954 (98.6% of extant)

Lost Bridges

Lost bridges: 19,841 (29.1% of all)
Bridges with photos: 9,533 (48.0% of lost)
Bridges with GPS coordinates: 19,325 (97.4% of lost)

By Design

Arch: 11,239 (16.5%)
- Deck arch: 10,470 (15.4%)
  - Brick arch: 80 (0.1%)
  - Closed-spandrel arch: 3,511 (5.2%)
  - Corrugated multi-plate arch: 5 (0.007%)
  - Iron arch: 9 (0.01%)
  - Luten arch: 79 (0.1%)
  - Open-spandrel arch: 677 (1.0%)
  - Ribbed closed-spandrel arch: 27 (0.04%)
  - Steel arch: 339 (0.5%)
  - Stone arch: 2,668 (3.9%)
  - Timber arch: 10 (0.01%)
- Pony arch: 55 (0.08%)
  - Concrete pony arch: 43 (0.06%)
  - Timber pony arch: 7 (0.01%)
- Through arch: 413 (0.6%)
  - Concrete through arch: 118 (0.2%)
  - Iron through arch: 3 (0.004%)
  - Marsh arch: 48 (0.07%)
  - Network arch: 6 (0.009%)
  - Steel through arch: 201 (0.3%)
  - Timber through arch: 20 (0.03%)
Beam: 11,325 (16.6%)
- Stringer: 8,445 (12.4%)
  - Concrete stringer: 487 (0.7%)
  - Steel stringer: 4,565 (6.7%)
  - Timber stringer: 2,433 (3.6%)
- Concrete tee beam: 2,480 (3.6%)
Culvert: 1,050 (1.5%)
- Concrete culvert: 408 (0.6%)
- Stone culvert: 296 (0.4%)
Ferry: 135 (0.2%)
Floating: 32 (0.05%)
- Pontoon: 30 (0.04%)
Rigid frame: 559 (0.8%)
- Concrete rigid frame: 470 (0.7%)
- Steel rigid frame: 70 (0.1%)
Girder: 7,553 (11.1%)
- Deck girder: 3,889 (5.7%)
  - Concrete deck girder: 405 (0.6%)
  - Deck plate girder: 3,254 (4.8%)
- Pony/through girder: 2,890 (4.2%)
  - Concrete pony/through girder: 286 (0.4%)
  - Concrete curved chord through girder: 70 (0.1%)
  - Pony/through plate girder: 2,409 (3.5%)
Other: 915 (1.3%)
Slab: 1,592 (2.3%)
Suspension: 710 (1.0%)
- Eyebar suspension: 13 (0.02%)
- Self-anchor suspension: 4 (0.006%)
- Cable-stayed: 88 (0.1%)
- Wire suspension: 551 (0.8%)
Truss: 29,971 (44.0%)
- Bedstead pony truss: 491 (0.7%)
  - Bedstead double-intersection Warren pony truss: 69 (0.1%)
  - Bedstead Pratt pony truss: 321 (0.5%)
  - Bedstead Warren pony truss: 99 (0.1%)
- Deck truss: 1,391 (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: 75 (0.1%)
  - Fink deck truss: 6 (0.009%)
  - Howe deck truss: 31 (0.05%)
  - K-deck truss: 3 (0.004%)
  - Lattice deck truss: 28 (0.04%)
  - Lenticular deck truss: 3 (0.004%)
  - Other deck truss: 13 (0.02%)
  - Pegram deck truss: 1 (0.001%)
  - Pratt deck truss: 266 (0.4%)
  - Queenpost deck truss: 1 (0.001%)
  - Scissors deck truss: 1 (0.001%)
  - Warren deck truss: 486 (0.7%)
    - Warren deck truss with alternating verticals: 48 (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: 73 (0.1%)
  - Whipple deck truss: 17 (0.02%)
  - 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: 140 (0.2%)
  - Modern deck truss: 2 (0.003%)
  - Modern pony truss: 86 (0.1%)
    - Modern bowstring pony truss: 18 (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: 15 (0.02%)
  - Modern through truss: 49 (0.07%)
    - Modern bowstring through truss: 10 (0.01%)
    - Modern polygonal Warren through truss: 7 (0.01%)
    - Modern Pratt through truss: 8 (0.01%)
    - Modern Warren through truss: 18 (0.03%)
- Pony truss: 14,362 (21.1%)
  - Bailey pony truss: 126 (0.2%)
  - Miller & Borcherding pony truss: 17 (0.02%)
  - Bowstring pony truss: 207 (0.3%)
  - Double-intersection Warren pony truss: 112 (0.2%)
  - Eiffel pony truss: 1 (0.001%)
  - Howe pony truss: 50 (0.07%)
  - Kingpost pony truss: 88 (0.1%)
  - Lane pony truss: 5 (0.007%)
  - Lattice pony truss: 19 (0.03%)
  - Lenticular pony truss: 67 (0.10%)
  - Other pony truss: 14 (0.02%)
  - Parker pony truss: 346 (0.5%)
  - Polygonal Warren pony truss: 556 (0.8%)
    - Polygonal Warren pony truss with alternating verticals: 135 (0.2%)
    - Polygonal Warren pony truss with no verticals: 8 (0.01%)
    - Polygonal Warren pony truss with all verticals: 39 (0.06%)
  - Post pony truss: 2 (0.003%)
  - Pratt pony truss: 2,408 (3.5%)
  - Half-hip Pratt pony truss: 392 (0.6%)
  - Queenpost pony truss: 106 (0.2%)
  - Truesdell pony truss: 5 (0.007%)
  - Vierendeel pony truss: 3 (0.004%)
  - Warren pony truss: 2,791 (4.1%)
    - Warren pony truss with alternating verticals: 506 (0.7%)
    - Warren pony truss with no verticals: 37 (0.05%)
    - Warren pony truss with all verticals: 318 (0.5%)
- Through truss: 13,163 (19.3%)
  - Baltimore through truss: 277 (0.4%)
  - Bollman through truss: 9 (0.01%)
  - Bowstring through truss: 201 (0.3%)
  - Brown through truss: 4 (0.006%)
  - Burr arch-truss: 289 (0.4%)
  - Camelback through truss: 292 (0.4%)
  - Childs through truss: 13 (0.02%)
  - Double-intersection Warren through truss: 159 (0.2%)
  - Eiffel through truss: 1 (0.001%)
  - Fink through truss: 5 (0.007%)
  - Hammond through truss: 3 (0.004%)
  - Haupt through truss: 5 (0.007%)
  - Howe through truss: 359 (0.5%)
  - Inverted bowstring through truss: 5 (0.007%)
  - K-Parker through truss: 66 (0.10%)
  - K-Truss through truss: 13 (0.02%)
  - Kingpost through truss: 49 (0.07%)
  - Lattice through truss: 469 (0.7%)
    - Quadrangular lattice through truss: 158 (0.2%)
    - Quintangular lattice through truss: 1 (0.001%)
    - Town lattice truss: 222 (0.3%)
    - Triple-intersection lattice through truss: 27 (0.04%)
  - Lenticular through truss: 63 (0.09%)
  - Lenticular Warren through truss: 4 (0.006%)
  - Long through truss: 30 (0.04%)
  - Multiple Kingpost through truss: 131 (0.2%)
  - Other through truss: 20 (0.03%)
  - Paddleford through truss: 26 (0.04%)
  - Parker through truss: 1,165 (1.7%)
  - Partridge through truss: 8 (0.01%)
  - Pegram through truss: 14 (0.02%)
  - Pennsylvania through truss: 405 (0.6%)
  - Polygonal Warren through truss: 369 (0.5%)
    - Polygonal Warren through truss with alternating verticals: 34 (0.05%)
    - Polygonal Warren through truss with no verticals: 2 (0.003%)
    - Polygonal Warren through truss with sub-panels: 8 (0.01%)
    - Polygonal Warren through truss with all verticals: 88 (0.1%)
  - Post through truss: 32 (0.05%)
  - Pratt through truss: 4,570 (6.7%)
  - Queenpost through truss: 110 (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 (0.01%)
  - Warren through truss: 1,435 (2.1%)
    - Warren through truss with alternating verticals: 33 (0.05%)
    - Warren through truss with no verticals: 20 (0.03%)
    - Warren through truss with sub-panels: 68 (0.10%)
    - Warren through truss with all verticals: 332 (0.5%)
  - Wheeler through truss: 1 (0.001%)
  - Whipple through truss: 250 (0.4%)
Tunnel: 1,054 (1.5%)
Unknown: 1,984 (2.9%)

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