Road and railway bridges, viaducts, aqueducts and footbridges are included. Cumbernauld pioneered designs for underpasses and pedestrian footbridges as well as segregated footpaths. Various smaller pedestrian footbridges and two railway viaducts (one disused) also exist. M1938 infantry footbridges, M1938 ponton bridges, and M1940 treadway bridges, with numerous subvariants of each. Students could travel to adjacent blocks by linked walkways or footbridges. It does not include suspension bridges, footbridges or pipeline bridges. Nowadays clapper bridges are only used as footbridges. Rail station platforms may be connected by pedestrian tunnels or footbridges. It does not include cable-stayed bridges, footbridges, or pipeline bridges. There are other footbridges with views of the river and its weirs. A number of different types were produced, ranging from footbridges to standard-gauge railway bridges. Many major casinos are connected by tunnels, footbridges, and monorails. The site straddles the River Welland, a pedestrian suspension bridge and two other footbridges. Design of footbridges normally follows the same principles as for other bridges. It includes long and narrow suspension footbridges across canyons and streams.