Website Statistics

All Bridges

Total listed bridges: 80,239
Bridges with photos: 50,072 (62.4%)
Bridges with Street View: 27,746 (34.6%)
Bridges with GPS coordinates: 79,510 (99.1%)
Total photos: 388,947

Extant Bridges

Extant bridges: 51,368 (64.0% of all)
Bridges with photos: 33,068 (64.4% of extant)
Bridges with Street View: 24,061 (46.8% of extant)
Bridges with GPS coordinates: 51,144 (99.6% of extant)

Lost Bridges

Lost bridges: 27,214 (33.9% of all)
Bridges with photos: 15,751 (57.9% of lost)
Bridges with GPS coordinates: 26,793 (98.5% of lost)

By Design

Arch: 12,368 (15.4%)
- Deck arch: 11,588 (14.4%)
  - Brick arch: 92 (0.1%)
  - Closed-spandrel arch: 3,978 (5.0%)
  - Corrugated multi-plate arch: 14 (0.02%)
  - Iron arch: 15 (0.02%)
  - Luten arch: 90 (0.1%)
  - Open-spandrel arch: 772 (1.0%)
  - Ribbed closed-spandrel arch: 29 (0.04%)
  - Steel arch: 390 (0.5%)
  - Stone arch: 3,157 (3.9%)
  - Timber arch: 18 (0.02%)
- Pony arch: 61 (0.08%)
  - Concrete pony arch: 49 (0.06%)
  - Timber pony arch: 7 (0.009%)
- Through arch: 439 (0.5%)
  - Concrete through arch: 117 (0.1%)
  - Iron through arch: 3 (0.004%)
  - Marsh arch: 55 (0.07%)
  - Network arch: 10 (0.01%)
  - Steel through arch: 215 (0.3%)
  - Timber through arch: 21 (0.03%)
Beam: 14,071 (17.5%)
- Stringer: 10,374 (12.9%)
  - Concrete stringer: 626 (0.8%)
  - Steel stringer: 5,809 (7.2%)
  - Timber stringer: 2,854 (3.6%)
- Concrete tee beam: 3,163 (3.9%)
Culvert: 1,382 (1.7%)
- Concrete culvert: 594 (0.7%)
- Stone culvert: 327 (0.4%)
Ferry: 196 (0.2%)
Floating: 39 (0.05%)
- Pontoon: 37 (0.05%)
Rigid frame: 725 (0.9%)
- Concrete rigid frame: 624 (0.8%)
- Steel rigid frame: 80 (0.10%)
Girder: 9,615 (12.0%)
- Deck girder: 5,031 (6.3%)
  - Concrete deck girder: 494 (0.6%)
  - Deck plate girder: 4,268 (5.3%)
- Pony/through girder: 3,706 (4.6%)
  - Concrete pony/through girder: 347 (0.4%)
  - Concrete curved chord through girder: 77 (0.10%)
  - Pony/through plate girder: 3,102 (3.9%)
Other: 951 (1.2%)
Slab: 1,993 (2.5%)
Suspension: 859 (1.1%)
- Eyebar suspension: 15 (0.02%)
- Self-anchor suspension: 5 (0.006%)
- Cable-stayed: 99 (0.1%)
- Wire suspension: 674 (0.8%)
Truss: 34,595 (43.1%)
- Bedstead pony truss: 528 (0.7%)
  - Bedstead double-intersection Warren pony truss: 70 (0.09%)
  - Bedstead Pratt pony truss: 352 (0.4%)
  - Bedstead Warren pony truss: 105 (0.1%)
- Deck truss: 1,686 (2.1%)
  - Deck arch-truss: 6 (0.007%)
  - Bailey deck truss: 5 (0.006%)
  - Baltimore deck truss: 29 (0.04%)
  - Canticrete deck truss: 2 (0.002%)
  - Double-intersection Warren deck truss: 86 (0.1%)
  - Fink deck truss: 8 (0.010%)
  - Howe deck truss: 52 (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 (0.002%)
  - Pratt deck truss: 322 (0.4%)
  - Queenpost deck truss: 3 (0.004%)
  - Scissors deck truss: 1 (0.001%)
  - Warren deck truss: 553 (0.7%)
    - Warren deck truss with alternating verticals: 65 (0.08%)
    - Warren deck truss with no verticals: 4 (0.005%)
    - Warren deck truss with sub-panels: 7 (0.009%)
    - Warren deck truss with all verticals: 90 (0.1%)
  - Whipple deck truss: 21 (0.03%)
  - Wichert deck truss: 4 (0.005%)
- Half-through truss: 14 (0.02%)
  - Lenticular half-through truss: 1 (0.001%)
  - Pratt half-through truss: 7 (0.009%)
- Modern truss: 174 (0.2%)
  - Modern deck truss: 2 (0.002%)
  - Modern pony truss: 116 (0.1%)
    - Modern bowstring pony truss: 22 (0.03%)
    - Modern Parker pony truss: 6 (0.007%)
    - Modern polygonal Warren pony truss: 22 (0.03%)
    - Modern Pratt pony truss: 35 (0.04%)
    - Modern Warren pony truss: 19 (0.02%)
  - Modern through truss: 54 (0.07%)
    - Modern bowstring through truss: 11 (0.01%)
    - Modern polygonal Warren through truss: 10 (0.01%)
    - Modern Pratt through truss: 9 (0.01%)
    - Modern Warren through truss: 19 (0.02%)
- Pony truss: 15,731 (19.6%)
  - Bailey pony truss: 170 (0.2%)
  - Miller & Borcherding pony truss: 18 (0.02%)
  - Bowstring pony truss: 310 (0.4%)
  - Double-intersection Warren pony truss: 125 (0.2%)
  - Eiffel pony truss: 1 (0.001%)
  - Howe pony truss: 66 (0.08%)
  - Kingpost pony truss: 101 (0.1%)
  - Lane pony truss: 6 (0.007%)
  - Lattice pony truss: 23 (0.03%)
  - Lenticular pony truss: 93 (0.1%)
  - Other pony truss: 17 (0.02%)
  - Parker pony truss: 378 (0.5%)
  - Polygonal Warren pony truss: 636 (0.8%)
    - Polygonal Warren pony truss with alternating verticals: 187 (0.2%)
    - Polygonal Warren pony truss with no verticals: 12 (0.01%)
    - Polygonal Warren pony truss with all verticals: 61 (0.08%)
  - Post pony truss: 3 (0.004%)
  - Pratt pony truss: 2,810 (3.5%)
  - Half-hip Pratt pony truss: 518 (0.6%)
  - Queenpost pony truss: 160 (0.2%)
  - Truesdell pony truss: 20 (0.02%)
  - Vierendeel pony truss: 3 (0.004%)
  - Warren pony truss: 3,256 (4.1%)
    - Warren pony truss with alternating verticals: 713 (0.9%)
    - Warren pony truss with no verticals: 58 (0.07%)
    - Warren pony truss with all verticals: 461 (0.6%)
- Through truss: 16,100 (20.1%)
  - Baltimore through truss: 325 (0.4%)
  - Bollman through truss: 14 (0.02%)
  - Bowstring through truss: 308 (0.4%)
  - Brown through truss: 4 (0.005%)
  - Burr arch-truss: 374 (0.5%)
  - Camelback through truss: 378 (0.5%)
  - Childs through truss: 14 (0.02%)
  - Double-intersection Warren through truss: 169 (0.2%)
  - Eiffel through truss: 1 (0.001%)
  - Fink through truss: 8 (0.010%)
  - Hammond through truss: 8 (0.010%)
  - Haupt through truss: 5 (0.006%)
  - Howe through truss: 471 (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: 61 (0.08%)
  - Lattice through truss: 602 (0.8%)
    - Quadrangular lattice through truss: 182 (0.2%)
    - Quintangular lattice through truss: 1 (0.001%)
    - Town lattice truss: 288 (0.4%)
    - Triple-intersection lattice through truss: 34 (0.04%)
  - Lenticular through truss: 83 (0.1%)
  - Lenticular Warren through truss: 5 (0.006%)
  - Long through truss: 38 (0.05%)
  - Multiple Kingpost through truss: 147 (0.2%)
  - Other through truss: 26 (0.03%)
  - Paddleford through truss: 28 (0.03%)
  - Parker through truss: 1,319 (1.6%)
  - Partridge through truss: 10 (0.01%)
  - Pegram through truss: 26 (0.03%)
  - Pennsylvania through truss: 537 (0.7%)
  - Polygonal Warren through truss: 436 (0.5%)
    - Polygonal Warren through truss with alternating verticals: 49 (0.06%)
    - Polygonal Warren through truss with no verticals: 4 (0.005%)
    - Polygonal Warren through truss with sub-panels: 15 (0.02%)
    - Polygonal Warren through truss with all verticals: 110 (0.1%)
  - Post through truss: 45 (0.06%)
  - Pratt through truss: 5,649 (7.0%)
  - Queenpost through truss: 114 (0.1%)
  - Smith through truss: 47 (0.06%)
  - Stearns through truss: 2 (0.002%)
  - Thacher through truss: 16 (0.02%)
  - Waddell "A" through truss: 7 (0.009%)
  - Warren through truss: 1,598 (2.0%)
    - Warren through truss with alternating verticals: 45 (0.06%)
    - Warren through truss with no verticals: 27 (0.03%)
    - Warren through truss with sub-panels: 72 (0.09%)
    - Warren through truss with all verticals: 403 (0.5%)
  - Wheeler through truss: 1 (0.001%)
  - Whipple through truss: 395 (0.5%)
Tunnel: 1,339 (1.7%)
Unknown: 2,106 (2.6%)

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