Website Statistics

All Bridges

Total listed bridges: 63,919
Bridges with photos: 34,567 (54.1%)
Bridges with Street View: 21,462 (33.6%)
Bridges with GPS coordinates: 62,669 (98.0%)
Total photos: 274,569

Extant Bridges

Extant bridges: 44,220 (69.2% of all)
Bridges with photos: 23,029 (52.1% of extant)
Bridges with Street View: 19,005 (43.0% of extant)
Bridges with GPS coordinates: 43,567 (98.5% of extant)

Lost Bridges

Lost bridges: 18,284 (28.6% of all)
Bridges with photos: 7,224 (39.5% of lost)
Bridges with GPS coordinates: 17,789 (97.3% of lost)

By Design

Arch: 10,932 (17.1%)
- Deck arch: 10,183 (15.9%)
  - Brick arch: 66 (0.1%)
  - Closed-spandrel arch: 3,374 (5.3%)
  - Corrugated multi-plate arch: 5 (0.008%)
  - Iron arch: 9 (0.01%)
  - Luten arch: 75 (0.1%)
  - Open-spandrel arch: 664 (1.0%)
  - Ribbed closed-spandrel arch: 25 (0.04%)
  - Steel arch: 333 (0.5%)
  - Stone arch: 2,578 (4.0%)
  - Timber arch: 8 (0.01%)
- Pony arch: 52 (0.08%)
  - Concrete pony arch: 40 (0.06%)
  - Timber pony arch: 7 (0.01%)
- Through arch: 397 (0.6%)
  - Concrete through arch: 118 (0.2%)
  - Iron through arch: 3 (0.005%)
  - Marsh arch: 45 (0.07%)
  - Network arch: 4 (0.006%)
  - Steel through arch: 193 (0.3%)
  - Timber through arch: 16 (0.03%)
Beam: 9,877 (15.5%)
- Stringer: 7,547 (11.8%)
  - Concrete stringer: 414 (0.6%)
  - Steel stringer: 4,026 (6.3%)
  - Timber stringer: 2,276 (3.6%)
- Concrete tee beam: 1,990 (3.1%)
Culvert: 894 (1.4%)
- Concrete culvert: 336 (0.5%)
- Stone culvert: 292 (0.5%)
Ferry: 114 (0.2%)
Floating: 30 (0.05%)
- Pontoon: 27 (0.04%)
Rigid frame: 468 (0.7%)
- Concrete rigid frame: 405 (0.6%)
- Steel rigid frame: 47 (0.07%)
Girder: 6,771 (10.6%)
- Deck girder: 3,542 (5.5%)
  - Concrete deck girder: 390 (0.6%)
  - Deck plate girder: 2,950 (4.6%)
- Pony/through girder: 2,570 (4.0%)
  - Concrete pony/through girder: 270 (0.4%)
  - Concrete curved chord through girder: 68 (0.1%)
  - Pony/through plate girder: 2,123 (3.3%)
Other: 909 (1.4%)
Slab: 1,407 (2.2%)
Suspension: 679 (1.1%)
- Eyebar suspension: 12 (0.02%)
- Self-anchor suspension: 4 (0.006%)
- Cable-stayed: 85 (0.1%)
- Wire suspension: 532 (0.8%)
Truss: 29,089 (45.5%)
- Bedstead pony truss: 475 (0.7%)
  - Bedstead double-intersection Warren pony truss: 68 (0.1%)
  - Bedstead Pratt pony truss: 306 (0.5%)
  - Bedstead Warren pony truss: 99 (0.2%)
- Deck truss: 1,329 (2.1%)
  - Deck arch-truss: 2 (0.003%)
  - Bailey deck truss: 4 (0.006%)
  - Baltimore deck truss: 25 (0.04%)
  - Canticrete deck truss: 2 (0.003%)
  - Double-intersection Warren deck truss: 72 (0.1%)
  - Fink deck truss: 5 (0.008%)
  - Howe deck truss: 28 (0.04%)
  - K-deck truss: 3 (0.005%)
  - Lattice deck truss: 26 (0.04%)
  - Lenticular deck truss: 3 (0.005%)
  - Other deck truss: 12 (0.02%)
  - Pegram deck truss: 1 (0.002%)
  - Pratt deck truss: 253 (0.4%)
  - Scissors deck truss: 1 (0.002%)
  - Warren deck truss: 457 (0.7%)
    - Warren deck truss with alternating verticals: 45 (0.07%)
    - Warren deck truss with no verticals: 1 (0.002%)
    - Warren deck truss with sub-panels: 5 (0.008%)
    - Warren deck truss with all verticals: 68 (0.1%)
  - Whipple deck truss: 16 (0.03%)
  - Wichert deck truss: 3 (0.005%)
- Half-through truss: 8 (0.01%)
  - Lenticular half-through truss: 1 (0.002%)
  - Pratt half-through truss: 4 (0.006%)
- Modern truss: 134 (0.2%)
  - Modern deck truss: 1 (0.002%)
  - Modern through truss: 85 (0.1%)
    - Modern bowstring pony truss: 17 (0.03%)
    - Modern Parker pony truss: 6 (0.009%)
    - Modern polygonal Warren pony truss: 15 (0.02%)
    - Modern Pratt pony truss: 24 (0.04%)
    - Modern Warren pony truss: 16 (0.03%)
  - Modern through truss: 45 (0.07%)
    - Modern bowstring through truss: 8 (0.01%)
    - Modern polygonal Warren through truss: 7 (0.01%)
    - Modern Pratt through truss: 8 (0.01%)
    - Modern Warren through truss: 16 (0.03%)
- Pony truss: 14,076 (22.0%)
  - Bailey pony truss: 113 (0.2%)
  - Miller & Borcherding pony truss: 17 (0.03%)
  - Bowstring pony truss: 176 (0.3%)
  - Double-intersection Warren pony truss: 105 (0.2%)
  - Eiffel pony truss: 1 (0.002%)
  - Howe pony truss: 48 (0.08%)
  - Kingpost pony truss: 80 (0.1%)
  - Lane pony truss: 5 (0.008%)
  - Lattice pony truss: 10 (0.02%)
  - Lenticular pony truss: 61 (0.10%)
  - Other pony truss: 13 (0.02%)
  - Parker pony truss: 335 (0.5%)
  - Polygonal Warren pony truss: 508 (0.8%)
    - Polygonal Warren pony truss with alternating verticals: 117 (0.2%)
    - Polygonal Warren pony truss with no verticals: 4 (0.006%)
    - Polygonal Warren pony truss with all verticals: 38 (0.06%)
  - Post pony truss: 2 (0.003%)
  - Pratt pony truss: 2,327 (3.6%)
  - Half-hip Pratt pony truss: 363 (0.6%)
  - Queenpost pony truss: 99 (0.2%)
  - Truesdell pony truss: 3 (0.005%)
  - Vierendeel pony truss: 3 (0.005%)
  - Warren pony truss: 2,694 (4.2%)
    - Warren pony truss with alternating verticals: 471 (0.7%)
    - Warren pony truss with no verticals: 35 (0.05%)
    - Warren pony truss with all verticals: 303 (0.5%)
- Through truss: 12,663 (19.8%)
  - Baltimore through truss: 259 (0.4%)
  - Bollman through truss: 8 (0.01%)
  - Bowstring through truss: 179 (0.3%)
  - Brown through truss: 4 (0.006%)
  - Burr arch-truss: 287 (0.4%)
  - Camelback through truss: 285 (0.4%)
  - Childs through truss: 13 (0.02%)
  - Double-intersection Warren through truss: 143 (0.2%)
  - Eiffel through truss: 1 (0.002%)
  - Fink through truss: 6 (0.009%)
  - Hammond through truss: 3 (0.005%)
  - Haupt through truss: 5 (0.008%)
  - Howe through truss: 329 (0.5%)
  - Inverted bowstring through truss: 5 (0.008%)
  - K-Parker through truss: 64 (0.1%)
  - K-Truss through truss: 13 (0.02%)
  - Kingpost through truss: 48 (0.08%)
  - Lattice through truss: 443 (0.7%)
    - Quadrangular lattice through truss: 144 (0.2%)
    - Quintangular lattice through truss: 1 (0.002%)
    - Town lattice truss: 212 (0.3%)
    - Triple-intersection lattice through truss: 27 (0.04%)
  - Lenticular through truss: 52 (0.08%)
  - Lenticular Warren through truss: 4 (0.006%)
  - Long through truss: 28 (0.04%)
  - Multiple Kingpost through truss: 131 (0.2%)
  - Other through truss: 18 (0.03%)
  - Paddleford through truss: 23 (0.04%)
  - Parker through truss: 1,123 (1.8%)
  - Partridge through truss: 8 (0.01%)
  - Pegram through truss: 14 (0.02%)
  - Pennsylvania through truss: 391 (0.6%)
  - Polygonal Warren through truss: 354 (0.6%)
    - Polygonal Warren through truss with alternating verticals: 31 (0.05%)
    - Polygonal Warren through truss with no verticals: 2 (0.003%)
    - Polygonal Warren through truss with sub-panels: 7 (0.01%)
    - Polygonal Warren through truss with all verticals: 81 (0.1%)
  - Post through truss: 29 (0.05%)
  - Pratt through truss: 4,378 (6.8%)
  - Queenpost through truss: 105 (0.2%)
  - Smith through truss: 30 (0.05%)
  - Stearns through truss: 2 (0.003%)
  - Thacher through truss: 12 (0.02%)
  - Waddell "A" through truss: 5 (0.008%)
  - Warren through truss: 1,355 (2.1%)
    - Warren through truss with alternating verticals: 27 (0.04%)
    - Warren through truss with no verticals: 16 (0.03%)
    - Warren through truss with sub-panels: 63 (0.10%)
    - Warren through truss with all verticals: 312 (0.5%)
  - Wheeler through truss: 1 (0.002%)
  - Whipple through truss: 231 (0.4%)
Tunnel: 1,005 (1.6%)
Unknown: 1,744 (2.7%)

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