Website Statistics

All Bridges

Total listed bridges: 69,171
Bridges with photos: 39,045 (56.4%)
Bridges with Street View: 24,183 (35.0%)
Bridges with GPS coordinates: 67,906 (98.2%)
Total photos: 316,977

Extant Bridges

Extant bridges: 47,189 (68.2% of all)
Bridges with photos: 26,680 (56.5% of extant)
Bridges with Street View: 21,145 (44.8% of extant)
Bridges with GPS coordinates: 46,575 (98.7% of extant)

Lost Bridges

Lost bridges: 20,275 (29.3% of all)
Bridges with photos: 9,590 (47.3% of lost)
Bridges with GPS coordinates: 19,739 (97.4% of lost)

By Design

Arch: 11,278 (16.3%)
- Deck arch: 10,505 (15.2%)
  - Brick arch: 82 (0.1%)
  - Closed-spandrel arch: 3,522 (5.1%)
  - Corrugated multi-plate arch: 8 (0.01%)
  - Iron arch: 9 (0.01%)
  - Luten arch: 80 (0.1%)
  - Open-spandrel arch: 682 (1.0%)
  - Ribbed closed-spandrel arch: 28 (0.04%)
  - Steel arch: 341 (0.5%)
  - Stone arch: 2,680 (3.9%)
  - Timber arch: 10 (0.01%)
- Pony arch: 57 (0.08%)
  - Concrete pony arch: 44 (0.06%)
  - Timber pony arch: 7 (0.01%)
- 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: 202 (0.3%)
  - Timber through arch: 20 (0.03%)
Beam: 11,663 (16.9%)
- Stringer: 8,623 (12.5%)
  - Concrete stringer: 494 (0.7%)
  - Steel stringer: 4,683 (6.8%)
  - Timber stringer: 2,455 (3.5%)
- Concrete tee beam: 2,606 (3.8%)
Culvert: 1,126 (1.6%)
- Concrete culvert: 444 (0.6%)
- Stone culvert: 300 (0.4%)
Ferry: 135 (0.2%)
Floating: 33 (0.05%)
- Pontoon: 31 (0.04%)
Rigid frame: 572 (0.8%)
- Concrete rigid frame: 483 (0.7%)
- Steel rigid frame: 70 (0.1%)
Girder: 7,695 (11.1%)
- Deck girder: 3,963 (5.7%)
  - Concrete deck girder: 419 (0.6%)
  - Deck plate girder: 3,310 (4.8%)
- Pony/through girder: 2,923 (4.2%)
  - Concrete pony/through girder: 288 (0.4%)
  - Concrete curved chord through girder: 71 (0.1%)
  - Pony/through plate girder: 2,436 (3.5%)
Other: 930 (1.3%)
Slab: 1,648 (2.4%)
Suspension: 719 (1.0%)
- Eyebar suspension: 13 (0.02%)
- Self-anchor suspension: 4 (0.006%)
- Cable-stayed: 90 (0.1%)
- Wire suspension: 558 (0.8%)
Truss: 30,228 (43.7%)
- Bedstead pony truss: 496 (0.7%)
  - Bedstead double-intersection Warren pony truss: 69 (0.10%)
  - Bedstead Pratt pony truss: 326 (0.5%)
  - Bedstead Warren pony truss: 99 (0.1%)
- Deck truss: 1,413 (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: 32 (0.05%)
  - K-deck truss: 3 (0.004%)
  - Lattice deck truss: 29 (0.04%)
  - Lenticular deck truss: 3 (0.004%)
  - Other deck truss: 13 (0.02%)
  - Pegram deck truss: 2 (0.003%)
  - Pratt deck truss: 274 (0.4%)
  - Queenpost deck truss: 1 (0.001%)
  - Scissors deck truss: 1 (0.001%)
  - Warren deck truss: 489 (0.7%)
    - Warren deck truss with alternating verticals: 49 (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: 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: 142 (0.2%)
  - Modern deck truss: 2 (0.003%)
  - Modern pony truss: 88 (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: 14,434 (20.9%)
  - Bailey pony truss: 128 (0.2%)
  - Miller & Borcherding pony truss: 17 (0.02%)
  - Bowstring pony truss: 217 (0.3%)
  - Double-intersection Warren pony truss: 112 (0.2%)
  - Eiffel pony truss: 1 (0.001%)
  - Howe pony truss: 51 (0.07%)
  - Kingpost pony truss: 90 (0.1%)
  - Lane pony truss: 5 (0.007%)
  - Lattice pony truss: 20 (0.03%)
  - Lenticular pony truss: 68 (0.10%)
  - Other pony truss: 14 (0.02%)
  - Parker pony truss: 347 (0.5%)
  - Polygonal Warren pony truss: 563 (0.8%)
    - Polygonal Warren pony truss with alternating verticals: 136 (0.2%)
    - Polygonal Warren pony truss with no verticals: 8 (0.01%)
    - Polygonal Warren pony truss with all verticals: 44 (0.06%)
  - Post pony truss: 2 (0.003%)
  - Pratt pony truss: 2,439 (3.5%)
  - Half-hip Pratt pony truss: 399 (0.6%)
  - Queenpost pony truss: 110 (0.2%)
  - Truesdell pony truss: 5 (0.007%)
  - Vierendeel pony truss: 3 (0.004%)
  - Warren pony truss: 2,797 (4.0%)
    - Warren pony truss with alternating verticals: 510 (0.7%)
    - Warren pony truss with no verticals: 37 (0.05%)
    - Warren pony truss with all verticals: 320 (0.5%)
- Through truss: 13,317 (19.3%)
  - Baltimore through truss: 278 (0.4%)
  - Bollman through truss: 9 (0.01%)
  - Bowstring through truss: 205 (0.3%)
  - Brown through truss: 4 (0.006%)
  - Burr arch-truss: 292 (0.4%)
  - Camelback through truss: 295 (0.4%)
  - Childs through truss: 13 (0.02%)
  - Double-intersection Warren through truss: 160 (0.2%)
  - Eiffel through truss: 1 (0.001%)
  - Fink through truss: 5 (0.007%)
  - Hammond through truss: 4 (0.006%)
  - Haupt through truss: 5 (0.007%)
  - Howe through truss: 364 (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: 51 (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: 64 (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: 1,170 (1.7%)
  - Partridge through truss: 8 (0.01%)
  - Pegram through truss: 22 (0.03%)
  - Pennsylvania through truss: 406 (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: 34 (0.05%)
  - Pratt through truss: 4,607 (6.7%)
  - Queenpost through truss: 111 (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: 1,442 (2.1%)
    - Warren through truss with alternating verticals: 33 (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: 333 (0.5%)
  - Wheeler through truss: 1 (0.001%)
  - Whipple through truss: 266 (0.4%)
Tunnel: 1,061 (1.5%)
Unknown: 2,083 (3.0%)

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