Website Statistics

All Bridges

Total listed bridges: 79,579
Bridges with photos: 49,491 (62.2%)
Bridges with Street View: 27,608 (34.7%)
Bridges with GPS coordinates: 78,845 (99.1%)
Total photos: 385,933

Extant Bridges

Extant bridges: 51,200 (64.3% of all)
Bridges with photos: 30,444 (59.5% of extant)
Bridges with Street View: 23,951 (46.8% of extant)
Bridges with GPS coordinates: 50,974 (99.6% of extant)

Lost Bridges

Lost bridges: 26,743 (33.6% of all)
Bridges with photos: 13,350 (49.9% of lost)
Bridges with GPS coordinates: 26,320 (98.4% of lost)

By Design

Arch: 12,321 (15.5%)
- Deck arch: 11,540 (14.5%)
  - Brick arch: 91 (0.1%)
  - Closed-spandrel arch: 3,960 (5.0%)
  - Corrugated multi-plate arch: 14 (0.02%)
  - Iron arch: 15 (0.02%)
  - Luten arch: 89 (0.1%)
  - Open-spandrel arch: 767 (1.0%)
  - Ribbed closed-spandrel arch: 29 (0.04%)
  - Steel arch: 383 (0.5%)
  - Stone arch: 3,142 (3.9%)
  - Timber arch: 18 (0.02%)
- Pony arch: 60 (0.08%)
  - Concrete pony arch: 48 (0.06%)
  - Timber pony arch: 7 (0.009%)
- Through arch: 440 (0.6%)
  - Concrete through arch: 117 (0.1%)
  - Iron through arch: 3 (0.004%)
  - Marsh arch: 54 (0.07%)
  - Network arch: 9 (0.01%)
  - Steel through arch: 218 (0.3%)
  - Timber through arch: 21 (0.03%)
Beam: 14,006 (17.6%)
- Stringer: 10,321 (13.0%)
  - Concrete stringer: 626 (0.8%)
  - Steel stringer: 5,773 (7.3%)
  - Timber stringer: 2,840 (3.6%)
- Concrete tee beam: 3,155 (4.0%)
Culvert: 1,375 (1.7%)
- Concrete culvert: 590 (0.7%)
- Stone culvert: 325 (0.4%)
Ferry: 194 (0.2%)
Floating: 38 (0.05%)
- Pontoon: 36 (0.05%)
Rigid frame: 720 (0.9%)
- Concrete rigid frame: 621 (0.8%)
- Steel rigid frame: 80 (0.1%)
Girder: 9,536 (12.0%)
- Deck girder: 4,973 (6.2%)
  - Concrete deck girder: 493 (0.6%)
  - Deck plate girder: 4,215 (5.3%)
- Pony/through girder: 3,683 (4.6%)
  - Concrete pony/through girder: 345 (0.4%)
  - Concrete curved chord through girder: 77 (0.10%)
  - Pony/through plate girder: 3,083 (3.9%)
Other: 955 (1.2%)
Slab: 1,988 (2.5%)
Suspension: 850 (1.1%)
- Eyebar suspension: 15 (0.02%)
- Self-anchor suspension: 5 (0.006%)
- Cable-stayed: 98 (0.1%)
- Wire suspension: 666 (0.8%)
Truss: 34,174 (42.9%)
- Bedstead pony truss: 526 (0.7%)
  - Bedstead double-intersection Warren pony truss: 70 (0.09%)
  - Bedstead Pratt pony truss: 350 (0.4%)
  - Bedstead Warren pony truss: 105 (0.1%)
- Deck truss: 1,659 (2.1%)
  - Deck arch-truss: 6 (0.008%)
  - Bailey deck truss: 5 (0.006%)
  - Baltimore deck truss: 30 (0.04%)
  - Canticrete deck truss: 2 (0.003%)
  - Double-intersection Warren deck truss: 85 (0.1%)
  - Fink deck truss: 8 (0.01%)
  - Howe deck truss: 49 (0.06%)
  - K-deck truss: 3 (0.004%)
  - Lattice deck truss: 29 (0.04%)
  - Lenticular deck truss: 4 (0.005%)
  - Other deck truss: 23 (0.03%)
  - Pegram deck truss: 2 (0.003%)
  - Pratt deck truss: 317 (0.4%)
  - Queenpost deck truss: 3 (0.004%)
  - Scissors deck truss: 1 (0.001%)
  - Warren deck truss: 540 (0.7%)
    - Warren deck truss with alternating verticals: 61 (0.08%)
    - Warren deck truss with no verticals: 4 (0.005%)
    - Warren deck truss with sub-panels: 6 (0.008%)
    - Warren deck truss with all verticals: 85 (0.1%)
  - Whipple deck truss: 21 (0.03%)
  - Wichert deck truss: 4 (0.005%)
- Half-through truss: 13 (0.02%)
  - Lenticular half-through truss: 1 (0.001%)
  - Pratt half-through truss: 6 (0.008%)
- Modern truss: 171 (0.2%)
  - Modern deck truss: 2 (0.003%)
  - Modern pony truss: 114 (0.1%)
    - Modern bowstring pony truss: 22 (0.03%)
    - Modern Parker pony truss: 6 (0.008%)
    - Modern polygonal Warren pony truss: 21 (0.03%)
    - Modern Pratt pony truss: 35 (0.04%)
    - Modern Warren pony truss: 18 (0.02%)
  - Modern through truss: 53 (0.07%)
    - Modern bowstring through truss: 11 (0.01%)
    - Modern polygonal Warren through truss: 9 (0.01%)
    - Modern Pratt through truss: 9 (0.01%)
    - Modern Warren through truss: 19 (0.02%)
- Pony truss: 15,629 (19.6%)
  - Bailey pony truss: 170 (0.2%)
  - Miller & Borcherding pony truss: 18 (0.02%)
  - Bowstring pony truss: 295 (0.4%)
  - Double-intersection Warren pony truss: 124 (0.2%)
  - Eiffel pony truss: 1 (0.001%)
  - Howe pony truss: 62 (0.08%)
  - Kingpost pony truss: 99 (0.1%)
  - Lane pony truss: 6 (0.008%)
  - Lattice pony truss: 23 (0.03%)
  - Lenticular pony truss: 90 (0.1%)
  - Other pony truss: 17 (0.02%)
  - Parker pony truss: 378 (0.5%)
  - Polygonal Warren pony truss: 629 (0.8%)
    - Polygonal Warren pony truss with alternating verticals: 182 (0.2%)
    - Polygonal Warren pony truss with no verticals: 12 (0.02%)
    - Polygonal Warren pony truss with all verticals: 60 (0.08%)
  - Post pony truss: 3 (0.004%)
  - Pratt pony truss: 2,777 (3.5%)
  - Half-hip Pratt pony truss: 511 (0.6%)
  - Queenpost pony truss: 157 (0.2%)
  - Truesdell pony truss: 20 (0.03%)
  - Vierendeel pony truss: 3 (0.004%)
  - Warren pony truss: 3,240 (4.1%)
    - Warren pony truss with alternating verticals: 707 (0.9%)
    - Warren pony truss with no verticals: 56 (0.07%)
    - Warren pony truss with all verticals: 457 (0.6%)
- Through truss: 15,820 (19.9%)
  - Baltimore through truss: 325 (0.4%)
  - Bollman through truss: 13 (0.02%)
  - Bowstring through truss: 292 (0.4%)
  - Brown through truss: 4 (0.005%)
  - Burr arch-truss: 370 (0.5%)
  - Camelback through truss: 372 (0.5%)
  - Childs through truss: 14 (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: 8 (0.01%)
  - Haupt through truss: 5 (0.006%)
  - Howe through truss: 455 (0.6%)
  - Inverted bowstring through truss: 7 (0.009%)
  - K-Parker through truss: 71 (0.09%)
  - K-Truss through truss: 14 (0.02%)
  - Kingpost through truss: 59 (0.07%)
  - Lattice through truss: 592 (0.7%)
    - Quadrangular lattice through truss: 181 (0.2%)
    - Quintangular lattice through truss: 1 (0.001%)
    - Town lattice truss: 285 (0.4%)
    - Triple-intersection lattice through truss: 33 (0.04%)
  - Lenticular through truss: 81 (0.1%)
  - Lenticular Warren through truss: 5 (0.006%)
  - Long through truss: 37 (0.05%)
  - Multiple Kingpost through truss: 145 (0.2%)
  - Other through truss: 25 (0.03%)
  - Paddleford through truss: 28 (0.04%)
  - Parker through truss: 1,308 (1.6%)
  - Partridge through truss: 9 (0.01%)
  - Pegram through truss: 26 (0.03%)
  - Pennsylvania through truss: 518 (0.7%)
  - Polygonal Warren through truss: 433 (0.5%)
    - Polygonal Warren through truss with alternating verticals: 50 (0.06%)
    - Polygonal Warren through truss with no verticals: 4 (0.005%)
    - Polygonal Warren through truss with sub-panels: 13 (0.02%)
    - Polygonal Warren through truss with all verticals: 109 (0.1%)
  - Post through truss: 45 (0.06%)
  - Pratt through truss: 5,529 (6.9%)
  - Queenpost through truss: 114 (0.1%)
  - Smith through truss: 46 (0.06%)
  - Stearns through truss: 2 (0.003%)
  - Thacher through truss: 16 (0.02%)
  - Waddell "A" through truss: 7 (0.009%)
  - Warren through truss: 1,585 (2.0%)
    - Warren through truss with alternating verticals: 45 (0.06%)
    - Warren through truss with no verticals: 28 (0.04%)
    - Warren through truss with sub-panels: 72 (0.09%)
    - Warren through truss with all verticals: 395 (0.5%)
  - Wheeler through truss: 1 (0.001%)
  - Whipple through truss: 389 (0.5%)
Tunnel: 1,336 (1.7%)
Unknown: 2,086 (2.6%)

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