Website Statistics

All Bridges

Total listed bridges: 77,707
Bridges with photos: 47,618 (61.3%)
Bridges with Street View: 26,951 (34.7%)
Bridges with GPS coordinates: 76,909 (99.0%)
Total photos: 372,526

Extant Bridges

Extant bridges: 50,712 (65.3% of all)
Bridges with photos: 30,577 (60.3% of extant)
Bridges with Street View: 23,422 (46.2% of extant)
Bridges with GPS coordinates: 50,456 (99.5% of extant)

Lost Bridges

Lost bridges: 25,315 (32.6% of all)
Bridges with photos: 13,194 (52.1% of lost)
Bridges with GPS coordinates: 24,864 (98.2% of lost)

By Design

Arch: 12,134 (15.6%)
- Deck arch: 11,352 (14.6%)
  - Brick arch: 92 (0.1%)
  - Closed-spandrel arch: 3,864 (5.0%)
  - Corrugated multi-plate arch: 13 (0.02%)
  - Iron arch: 14 (0.02%)
  - Luten arch: 88 (0.1%)
  - Open-spandrel arch: 754 (1.0%)
  - Ribbed closed-spandrel arch: 29 (0.04%)
  - Steel arch: 379 (0.5%)
  - Stone arch: 3,054 (3.9%)
  - Timber arch: 15 (0.02%)
- Pony arch: 60 (0.08%)
  - Concrete pony arch: 47 (0.06%)
  - Timber pony arch: 7 (0.009%)
- Through arch: 438 (0.6%)
  - Concrete through arch: 119 (0.2%)
  - Iron through arch: 3 (0.004%)
  - Marsh arch: 51 (0.07%)
  - Network arch: 9 (0.01%)
  - Steel through arch: 217 (0.3%)
  - Timber through arch: 21 (0.03%)
Beam: 13,735 (17.7%)
- Stringer: 10,090 (13.0%)
  - Concrete stringer: 604 (0.8%)
  - Steel stringer: 5,610 (7.2%)
  - Timber stringer: 2,792 (3.6%)
- Concrete tee beam: 3,124 (4.0%)
Culvert: 1,361 (1.8%)
- Concrete culvert: 585 (0.8%)
- Stone culvert: 322 (0.4%)
Ferry: 181 (0.2%)
Floating: 36 (0.05%)
- Pontoon: 34 (0.04%)
Rigid frame: 705 (0.9%)
- Concrete rigid frame: 607 (0.8%)
- Steel rigid frame: 79 (0.1%)
Girder: 9,204 (11.8%)
- Deck girder: 4,793 (6.2%)
  - Concrete deck girder: 485 (0.6%)
  - Deck plate girder: 4,047 (5.2%)
- Pony/through girder: 3,539 (4.6%)
  - Concrete pony/through girder: 337 (0.4%)
  - Concrete curved chord through girder: 73 (0.09%)
  - Pony/through plate girder: 2,960 (3.8%)
Other: 949 (1.2%)
Slab: 1,945 (2.5%)
Suspension: 817 (1.1%)
- Eyebar suspension: 15 (0.02%)
- Self-anchor suspension: 4 (0.005%)
- Cable-stayed: 94 (0.1%)
- Wire suspension: 641 (0.8%)
Truss: 33,191 (42.7%)
- Bedstead pony truss: 523 (0.7%)
  - Bedstead double-intersection Warren pony truss: 69 (0.09%)
  - Bedstead Pratt pony truss: 348 (0.4%)
  - Bedstead Warren pony truss: 105 (0.1%)
- Deck truss: 1,581 (2.0%)
  - Deck arch-truss: 4 (0.005%)
  - Bailey deck truss: 5 (0.006%)
  - Baltimore deck truss: 27 (0.03%)
  - Canticrete deck truss: 2 (0.003%)
  - Double-intersection Warren deck truss: 81 (0.1%)
  - Fink deck truss: 7 (0.009%)
  - Howe deck truss: 47 (0.06%)
  - K-deck truss: 3 (0.004%)
  - Lattice deck truss: 28 (0.04%)
  - Lenticular deck truss: 4 (0.005%)
  - Other deck truss: 20 (0.03%)
  - Pegram deck truss: 2 (0.003%)
  - Pratt deck truss: 300 (0.4%)
  - Queenpost deck truss: 3 (0.004%)
  - Scissors deck truss: 1 (0.001%)
  - Warren deck truss: 527 (0.7%)
    - Warren deck truss with alternating verticals: 60 (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: 83 (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: 161 (0.2%)
  - Modern deck truss: 2 (0.003%)
  - Modern pony truss: 104 (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: 34 (0.04%)
    - Modern Warren pony truss: 17 (0.02%)
  - Modern through truss: 52 (0.07%)
    - Modern bowstring through truss: 11 (0.01%)
    - Modern polygonal Warren through truss: 7 (0.009%)
    - Modern Pratt through truss: 9 (0.01%)
    - Modern Warren through truss: 19 (0.02%)
- Pony truss: 15,335 (19.7%)
  - Bailey pony truss: 163 (0.2%)
  - Miller & Borcherding pony truss: 18 (0.02%)
  - Bowstring pony truss: 267 (0.3%)
  - Double-intersection Warren pony truss: 121 (0.2%)
  - Eiffel pony truss: 1 (0.001%)
  - Howe pony truss: 60 (0.08%)
  - Kingpost pony truss: 95 (0.1%)
  - Lane pony truss: 6 (0.008%)
  - Lattice pony truss: 23 (0.03%)
  - Lenticular pony truss: 84 (0.1%)
  - Other pony truss: 17 (0.02%)
  - Parker pony truss: 371 (0.5%)
  - Polygonal Warren pony truss: 608 (0.8%)
    - Polygonal Warren pony truss with alternating verticals: 168 (0.2%)
    - Polygonal Warren pony truss with no verticals: 11 (0.01%)
    - Polygonal Warren pony truss with all verticals: 58 (0.07%)
  - Post pony truss: 3 (0.004%)
  - Pratt pony truss: 2,689 (3.5%)
  - Half-hip Pratt pony truss: 483 (0.6%)
  - Queenpost pony truss: 149 (0.2%)
  - Truesdell pony truss: 10 (0.01%)
  - Vierendeel pony truss: 3 (0.004%)
  - Warren pony truss: 3,173 (4.1%)
    - Warren pony truss with alternating verticals: 666 (0.9%)
    - Warren pony truss with no verticals: 50 (0.06%)
    - Warren pony truss with all verticals: 449 (0.6%)
- Through truss: 15,236 (19.6%)
  - Baltimore through truss: 313 (0.4%)
  - Bollman through truss: 13 (0.02%)
  - Bowstring through truss: 271 (0.3%)
  - Brown through truss: 4 (0.005%)
  - Burr arch-truss: 360 (0.5%)
  - Camelback through truss: 357 (0.5%)
  - Childs through truss: 13 (0.02%)
  - Double-intersection Warren through truss: 167 (0.2%)
  - Eiffel through truss: 1 (0.001%)
  - Fink through truss: 8 (0.01%)
  - Hammond through truss: 7 (0.009%)
  - Haupt through truss: 5 (0.006%)
  - Howe through truss: 440 (0.6%)
  - Inverted bowstring through truss: 6 (0.008%)
  - K-Parker through truss: 68 (0.09%)
  - K-Truss through truss: 15 (0.02%)
  - Kingpost through truss: 55 (0.07%)
  - Lattice through truss: 560 (0.7%)
    - Quadrangular lattice through truss: 176 (0.2%)
    - Quintangular lattice through truss: 1 (0.001%)
    - Town lattice truss: 267 (0.3%)
    - Triple-intersection lattice through truss: 33 (0.04%)
  - Lenticular through truss: 75 (0.10%)
  - Lenticular Warren through truss: 4 (0.005%)
  - Long through truss: 34 (0.04%)
  - Multiple Kingpost through truss: 144 (0.2%)
  - Other through truss: 28 (0.04%)
  - Paddleford through truss: 28 (0.04%)
  - Parker through truss: 1,280 (1.6%)
  - Partridge through truss: 9 (0.01%)
  - Pegram through truss: 23 (0.03%)
  - Pennsylvania through truss: 482 (0.6%)
  - Polygonal Warren through truss: 425 (0.5%)
    - Polygonal Warren through truss with alternating verticals: 48 (0.06%)
    - Polygonal Warren through truss with no verticals: 3 (0.004%)
    - Polygonal Warren through truss with sub-panels: 13 (0.02%)
    - Polygonal Warren through truss with all verticals: 106 (0.1%)
  - Post through truss: 43 (0.06%)
  - Pratt through truss: 5,286 (6.8%)
  - Queenpost through truss: 115 (0.1%)
  - Smith through truss: 45 (0.06%)
  - Stearns through truss: 2 (0.003%)
  - Thacher through truss: 14 (0.02%)
  - Waddell "A" through truss: 7 (0.009%)
  - Warren through truss: 1,553 (2.0%)
    - Warren through truss with alternating verticals: 43 (0.06%)
    - Warren through truss with no verticals: 27 (0.03%)
    - Warren through truss with sub-panels: 71 (0.09%)
    - Warren through truss with all verticals: 387 (0.5%)
  - Wheeler through truss: 1 (0.001%)
  - Whipple through truss: 355 (0.5%)
Tunnel: 1,317 (1.7%)
Unknown: 2,132 (2.7%)

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