Website Statistics

All Bridges

Total listed bridges: 67,210
Bridges with photos: 37,808 (56.3%)
Bridges with Street View: 23,237 (34.6%)
Bridges with GPS coordinates: 65,928 (98.1%)
Total photos: 303,809

Extant Bridges

Extant bridges: 46,096 (68.6% of all)
Bridges with photos: 26,761 (58.1% of extant)
Bridges with Street View: 20,421 (44.3% of extant)
Bridges with GPS coordinates: 45,447 (98.6% of extant)

Lost Bridges

Lost bridges: 19,510 (29.0% of all)
Bridges with photos: 9,460 (48.5% of lost)
Bridges with GPS coordinates: 18,992 (97.3% of lost)

By Design

Arch: 11,169 (16.6%)
- Deck arch: 10,400 (15.5%)
  - Brick arch: 79 (0.1%)
  - Closed-spandrel arch: 3,487 (5.2%)
  - Corrugated multi-plate arch: 5 (0.007%)
  - Iron arch: 9 (0.01%)
  - Luten arch: 78 (0.1%)
  - Open-spandrel arch: 675 (1.0%)
  - Ribbed closed-spandrel arch: 26 (0.04%)
  - Steel arch: 338 (0.5%)
  - Stone arch: 2,635 (3.9%)
  - Timber arch: 10 (0.01%)
- Pony arch: 56 (0.08%)
  - Concrete pony arch: 44 (0.07%)
  - Timber pony arch: 7 (0.01%)
- Through arch: 414 (0.6%)
  - Concrete through arch: 118 (0.2%)
  - Iron through arch: 3 (0.004%)
  - Marsh arch: 47 (0.07%)
  - Network arch: 7 (0.01%)
  - Steel through arch: 201 (0.3%)
  - Timber through arch: 20 (0.03%)
Beam: 11,009 (16.4%)
- Stringer: 8,271 (12.3%)
  - Concrete stringer: 492 (0.7%)
  - Steel stringer: 4,439 (6.6%)
  - Timber stringer: 2,382 (3.5%)
- Concrete tee beam: 2,346 (3.5%)
Culvert: 1,011 (1.5%)
- Concrete culvert: 402 (0.6%)
- Stone culvert: 294 (0.4%)
Ferry: 141 (0.2%)
Floating: 34 (0.05%)
- Pontoon: 30 (0.04%)
Rigid frame: 552 (0.8%)
- Concrete rigid frame: 466 (0.7%)
- Steel rigid frame: 67 (0.10%)
Girder: 7,450 (11.1%)
- Deck girder: 3,880 (5.8%)
  - Concrete deck girder: 412 (0.6%)
  - Deck plate girder: 3,234 (4.8%)
- Pony/through girder: 2,805 (4.2%)
  - Concrete pony/through girder: 278 (0.4%)
  - Concrete curved chord through girder: 70 (0.1%)
  - Pony/through plate girder: 2,335 (3.5%)
Other: 911 (1.4%)
Slab: 1,519 (2.3%)
Suspension: 705 (1.0%)
- Eyebar suspension: 15 (0.02%)
- Self-anchor suspension: 4 (0.006%)
- Cable-stayed: 89 (0.1%)
- Wire suspension: 547 (0.8%)
Truss: 29,749 (44.3%)
- Bedstead pony truss: 489 (0.7%)
  - Bedstead double-intersection Warren pony truss: 69 (0.1%)
  - Bedstead Pratt pony truss: 319 (0.5%)
  - Bedstead Warren pony truss: 99 (0.1%)
- Deck truss: 1,385 (2.1%)
  - Deck arch-truss: 3 (0.004%)
  - Bailey deck truss: 5 (0.007%)
  - Baltimore deck truss: 25 (0.04%)
  - Canticrete deck truss: 2 (0.003%)
  - Double-intersection Warren deck truss: 74 (0.1%)
  - Fink deck truss: 6 (0.009%)
  - Howe deck truss: 30 (0.04%)
  - 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: 264 (0.4%)
  - Queenpost deck truss: 1 (0.001%)
  - Scissors deck truss: 1 (0.001%)
  - Warren deck truss: 483 (0.7%)
    - Warren deck truss with alternating verticals: 47 (0.07%)
    - Warren deck truss with no verticals: 1 (0.001%)
    - Warren deck truss with sub-panels: 5 (0.007%)
    - Warren deck truss with all verticals: 73 (0.1%)
  - Whipple deck truss: 17 (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: 137 (0.2%)
  - Modern deck truss: 2 (0.003%)
  - Modern pony truss: 85 (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: 16 (0.02%)
  - Modern through truss: 47 (0.07%)
    - Modern bowstring through truss: 9 (0.01%)
    - Modern polygonal Warren through truss: 7 (0.01%)
    - Modern Pratt through truss: 8 (0.01%)
    - Modern Warren through truss: 17 (0.03%)
- Pony truss: 14,277 (21.2%)
  - Bailey pony truss: 119 (0.2%)
  - Miller & Borcherding pony truss: 17 (0.03%)
  - Bowstring pony truss: 197 (0.3%)
  - Double-intersection Warren pony truss: 111 (0.2%)
  - Eiffel pony truss: 1 (0.001%)
  - Howe pony truss: 49 (0.07%)
  - Kingpost pony truss: 85 (0.1%)
  - Lane pony truss: 5 (0.007%)
  - Lattice pony truss: 19 (0.03%)
  - Lenticular pony truss: 66 (0.10%)
  - Other pony truss: 14 (0.02%)
  - Parker pony truss: 344 (0.5%)
  - Polygonal Warren pony truss: 553 (0.8%)
    - Polygonal Warren pony truss with alternating verticals: 132 (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: 2,397 (3.6%)
  - Half-hip Pratt pony truss: 386 (0.6%)
  - Queenpost pony truss: 103 (0.2%)
  - Truesdell pony truss: 5 (0.007%)
  - Vierendeel pony truss: 3 (0.004%)
  - Warren pony truss: 2,769 (4.1%)
    - Warren pony truss with alternating verticals: 493 (0.7%)
    - Warren pony truss with no verticals: 37 (0.06%)
    - Warren pony truss with all verticals: 318 (0.5%)
- Through truss: 13,043 (19.4%)
  - Baltimore through truss: 275 (0.4%)
  - Bollman through truss: 9 (0.01%)
  - Bowstring through truss: 196 (0.3%)
  - Brown through truss: 4 (0.006%)
  - Burr arch-truss: 289 (0.4%)
  - Camelback through truss: 290 (0.4%)
  - Childs through truss: 13 (0.02%)
  - Double-intersection Warren through truss: 158 (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: 360 (0.5%)
  - Inverted bowstring through truss: 5 (0.007%)
  - K-Parker through truss: 67 (0.10%)
  - K-Truss through truss: 13 (0.02%)
  - Kingpost through truss: 49 (0.07%)
  - Lattice through truss: 464 (0.7%)
    - Quadrangular lattice through truss: 155 (0.2%)
    - Quintangular lattice through truss: 1 (0.001%)
    - Town lattice truss: 220 (0.3%)
    - Triple-intersection lattice through truss: 27 (0.04%)
  - Lenticular through truss: 60 (0.09%)
  - Lenticular Warren through truss: 4 (0.006%)
  - Long through truss: 30 (0.04%)
  - Multiple Kingpost through truss: 130 (0.2%)
  - Other through truss: 19 (0.03%)
  - Paddleford through truss: 26 (0.04%)
  - Parker through truss: 1,156 (1.7%)
  - Partridge through truss: 8 (0.01%)
  - Pegram through truss: 14 (0.02%)
  - Pennsylvania through truss: 404 (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: 87 (0.1%)
  - Post through truss: 32 (0.05%)
  - Pratt through truss: 4,520 (6.7%)
  - Queenpost through truss: 110 (0.2%)
  - Smith through truss: 30 (0.04%)
  - Stearns through truss: 2 (0.003%)
  - Thacher through truss: 12 (0.02%)
  - Waddell "A" through truss: 6 (0.009%)
  - Warren through truss: 1,422 (2.1%)
    - Warren through truss with alternating verticals: 30 (0.04%)
    - Warren through truss with no verticals: 18 (0.03%)
    - Warren through truss with sub-panels: 67 (0.10%)
    - Warren through truss with all verticals: 328 (0.5%)
  - Wheeler through truss: 1 (0.001%)
  - Whipple through truss: 242 (0.4%)
Tunnel: 1,050 (1.6%)
Unknown: 1,910 (2.8%)

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