Website Statistics

All Bridges

Total listed bridges: 75,838
Bridges with photos: 45,360 (59.8%)
Bridges with Street View: 26,372 (34.8%)
Bridges with GPS coordinates: 75,001 (98.9%)
Total photos: 358,820

Extant Bridges

Extant bridges: 50,043 (66.0% of all)
Bridges with photos: 30,711 (61.4% of extant)
Bridges with Street View: 22,983 (45.9% of extant)
Bridges with GPS coordinates: 49,763 (99.4% of extant)

Lost Bridges

Lost bridges: 24,111 (31.8% of all)
Bridges with photos: 13,002 (53.9% of lost)
Bridges with GPS coordinates: 23,652 (98.1% of lost)

By Design

Arch: 11,854 (15.6%)
- Deck arch: 11,074 (14.6%)
  - Brick arch: 91 (0.1%)
  - Closed-spandrel arch: 3,729 (4.9%)
  - Corrugated multi-plate arch: 13 (0.02%)
  - Iron arch: 13 (0.02%)
  - Luten arch: 85 (0.1%)
  - Open-spandrel arch: 720 (0.9%)
  - Ribbed closed-spandrel arch: 29 (0.04%)
  - Steel arch: 369 (0.5%)
  - Stone arch: 2,945 (3.9%)
  - Timber arch: 13 (0.02%)
- Pony arch: 60 (0.08%)
  - Concrete pony arch: 47 (0.06%)
  - Timber pony arch: 7 (0.009%)
- Through arch: 429 (0.6%)
  - Concrete through arch: 118 (0.2%)
  - Iron through arch: 3 (0.004%)
  - Marsh arch: 49 (0.06%)
  - Network arch: 7 (0.009%)
  - Steel through arch: 212 (0.3%)
  - Timber through arch: 21 (0.03%)
Beam: 13,312 (17.6%)
- Stringer: 9,754 (12.9%)
  - Concrete stringer: 578 (0.8%)
  - Steel stringer: 5,371 (7.1%)
  - Timber stringer: 2,736 (3.6%)
- Concrete tee beam: 3,042 (4.0%)
Culvert: 1,321 (1.7%)
- Concrete culvert: 548 (0.7%)
- Stone culvert: 316 (0.4%)
Ferry: 168 (0.2%)
Floating: 34 (0.04%)
- Pontoon: 32 (0.04%)
Rigid frame: 671 (0.9%)
- Concrete rigid frame: 577 (0.8%)
- Steel rigid frame: 75 (0.10%)
Girder: 8,899 (11.7%)
- Deck girder: 4,657 (6.1%)
  - Concrete deck girder: 470 (0.6%)
  - Deck plate girder: 3,932 (5.2%)
- Pony/through girder: 3,354 (4.4%)
  - Concrete pony/through girder: 325 (0.4%)
  - Concrete curved chord through girder: 73 (0.10%)
  - Pony/through plate girder: 2,808 (3.7%)
Other: 959 (1.3%)
Slab: 1,880 (2.5%)
Suspension: 784 (1.0%)
- Eyebar suspension: 14 (0.02%)
- Self-anchor suspension: 4 (0.005%)
- Cable-stayed: 94 (0.1%)
- Wire suspension: 609 (0.8%)
Truss: 32,493 (42.8%)
- Bedstead pony truss: 519 (0.7%)
  - Bedstead double-intersection Warren pony truss: 69 (0.09%)
  - Bedstead Pratt pony truss: 345 (0.5%)
  - Bedstead Warren pony truss: 104 (0.1%)
- Deck truss: 1,527 (2.0%)
  - Deck arch-truss: 4 (0.005%)
  - Bailey deck truss: 5 (0.007%)
  - Baltimore deck truss: 27 (0.04%)
  - Canticrete deck truss: 2 (0.003%)
  - Double-intersection Warren deck truss: 79 (0.1%)
  - Fink deck truss: 7 (0.009%)
  - Howe deck truss: 41 (0.05%)
  - K-deck truss: 3 (0.004%)
  - Lattice deck truss: 28 (0.04%)
  - Lenticular deck truss: 4 (0.005%)
  - Other deck truss: 18 (0.02%)
  - Pegram deck truss: 2 (0.003%)
  - Pratt deck truss: 293 (0.4%)
  - Queenpost deck truss: 2 (0.003%)
  - Scissors deck truss: 1 (0.001%)
  - Warren deck truss: 512 (0.7%)
    - Warren deck truss with alternating verticals: 56 (0.07%)
    - Warren deck truss with no verticals: 3 (0.004%)
    - Warren deck truss with sub-panels: 6 (0.008%)
    - Warren deck truss with all verticals: 77 (0.1%)
  - Whipple deck truss: 21 (0.03%)
  - Wichert deck truss: 3 (0.004%)
- Half-through truss: 12 (0.02%)
  - Lenticular half-through truss: 1 (0.001%)
  - Pratt half-through truss: 6 (0.008%)
- Modern truss: 157 (0.2%)
  - Modern deck truss: 2 (0.003%)
  - Modern pony truss: 101 (0.1%)
    - Modern bowstring pony truss: 20 (0.03%)
    - Modern Parker pony truss: 6 (0.008%)
    - Modern polygonal Warren pony truss: 16 (0.02%)
    - Modern Pratt pony truss: 31 (0.04%)
    - Modern Warren pony truss: 17 (0.02%)
  - Modern through truss: 51 (0.07%)
    - Modern bowstring through truss: 11 (0.01%)
    - Modern polygonal Warren through truss: 7 (0.009%)
    - Modern Pratt through truss: 10 (0.01%)
    - Modern Warren through truss: 18 (0.02%)
- Pony truss: 15,130 (20.0%)
  - Bailey pony truss: 159 (0.2%)
  - Miller & Borcherding pony truss: 18 (0.02%)
  - Bowstring pony truss: 250 (0.3%)
  - Double-intersection Warren pony truss: 117 (0.2%)
  - Eiffel pony truss: 1 (0.001%)
  - Howe pony truss: 57 (0.08%)
  - Kingpost pony truss: 94 (0.1%)
  - Lane pony truss: 6 (0.008%)
  - Lattice pony truss: 22 (0.03%)
  - Lenticular pony truss: 77 (0.1%)
  - Other pony truss: 17 (0.02%)
  - Parker pony truss: 364 (0.5%)
  - Polygonal Warren pony truss: 586 (0.8%)
    - Polygonal Warren pony truss with alternating verticals: 152 (0.2%)
    - Polygonal Warren pony truss with no verticals: 10 (0.01%)
    - Polygonal Warren pony truss with all verticals: 53 (0.07%)
  - Post pony truss: 3 (0.004%)
  - Pratt pony truss: 2,634 (3.5%)
  - Half-hip Pratt pony truss: 473 (0.6%)
  - Queenpost pony truss: 130 (0.2%)
  - Truesdell pony truss: 7 (0.009%)
  - Vierendeel pony truss: 3 (0.004%)
  - Warren pony truss: 3,082 (4.1%)
    - Warren pony truss with alternating verticals: 632 (0.8%)
    - Warren pony truss with no verticals: 46 (0.06%)
    - Warren pony truss with all verticals: 428 (0.6%)
- Through truss: 14,804 (19.5%)
  - Baltimore through truss: 311 (0.4%)
  - Bollman through truss: 13 (0.02%)
  - Bowstring through truss: 260 (0.3%)
  - Brown through truss: 4 (0.005%)
  - Burr arch-truss: 350 (0.5%)
  - Camelback through truss: 346 (0.5%)
  - Childs through truss: 13 (0.02%)
  - Double-intersection Warren through truss: 166 (0.2%)
  - Eiffel through truss: 1 (0.001%)
  - Fink through truss: 8 (0.01%)
  - Hammond through truss: 7 (0.009%)
  - Haupt through truss: 5 (0.007%)
  - Howe through truss: 423 (0.6%)
  - Inverted bowstring through truss: 6 (0.008%)
  - K-Parker through truss: 68 (0.09%)
  - K-Truss through truss: 14 (0.02%)
  - Kingpost through truss: 54 (0.07%)
  - Lattice through truss: 525 (0.7%)
    - Quadrangular lattice through truss: 172 (0.2%)
    - Quintangular lattice through truss: 1 (0.001%)
    - Town lattice truss: 242 (0.3%)
    - Triple-intersection lattice through truss: 32 (0.04%)
  - Lenticular through truss: 73 (0.10%)
  - Lenticular Warren through truss: 4 (0.005%)
  - Long through truss: 34 (0.04%)
  - Multiple Kingpost through truss: 142 (0.2%)
  - Other through truss: 26 (0.03%)
  - Paddleford through truss: 27 (0.04%)
  - Parker through truss: 1,250 (1.6%)
  - Partridge through truss: 9 (0.01%)
  - Pegram through truss: 23 (0.03%)
  - Pennsylvania through truss: 469 (0.6%)
  - Polygonal Warren through truss: 408 (0.5%)
    - Polygonal Warren through truss with alternating verticals: 45 (0.06%)
    - Polygonal Warren through truss with no verticals: 3 (0.004%)
    - Polygonal Warren through truss with sub-panels: 12 (0.02%)
    - Polygonal Warren through truss with all verticals: 99 (0.1%)
  - Post through truss: 40 (0.05%)
  - Pratt through truss: 5,145 (6.8%)
  - Queenpost through truss: 114 (0.2%)
  - Smith through truss: 38 (0.05%)
  - Stearns through truss: 2 (0.003%)
  - Thacher through truss: 14 (0.02%)
  - Waddell "A" through truss: 7 (0.009%)
  - Warren through truss: 1,525 (2.0%)
    - Warren through truss with alternating verticals: 41 (0.05%)
    - Warren through truss with no verticals: 25 (0.03%)
    - Warren through truss with sub-panels: 68 (0.09%)
    - Warren through truss with all verticals: 369 (0.5%)
  - Wheeler through truss: 1 (0.001%)
  - Whipple through truss: 343 (0.5%)
Tunnel: 1,239 (1.6%)
Unknown: 2,224 (2.9%)

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