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Wildlife crossing is the umbrella term encompassing underpasses, overpasses, ecoducts, green bridges, amphibian/small mammal tunnels, and wildlife viaducts (Bank et al. 2002). All of these structures are designed to provide semi-natural corridors above and below roads so that animals can safely cross without endangering themselves and motorists ...
The bridge is meant to allow animals to circulate through and thrive in habitats that are fragmented by human development. [1] The crossing is particularly critical for the mountain lions of the Santa Monica Mountains, which have declined and become genetically isolated [2] because the Ventura Freeway prevents them from moving between the mountains and the Simi Hills to the north.
In Europe, these tunnels are sometimes referred to as "herp tunnels" the name for the study of amphibians and reptiles: herpetology. The European herp tunnels followed the same design as the Henry Street tunnels: fences and tunnels beneath roads. [12] In Canada the city of Guelph, Ontario, has built tunnels to help reptiles cross roads.
The Yerba Buena Tunnel carries ten lanes of Interstate 80 (I-80) on two decks, connecting the two component spans of the Bay Bridge, the western suspension span and the eastern self-anchored suspension span. At the opening of the Bay Bridge in 1936, it was the world's largest-bore tunnel.
60th Street Tunnel, BMT Broadway Line (N, R, and W trains) under East River between Manhattan and Queens; 63rd Street Tunnel, IND 63rd Street Line (F and <F> train) under East River between Manhattan and Queens; 149th Street Tunnel, IRT Lenox Avenue Line under Harlem River between Manhattan and The Bronx
a bridge–tunnel carrying monorail Great Belt Fixed Link: 1997 Denmark Zealand and Funen Great Belt: includes a railway tunnel, bridge–tunnel transition uses natural island Øresund Bridge: 2000 Denmark/Sweden Copenhagen and Malmö: Øresund/Öresund: includes a railway tunnel Shanghai Yangtze River Tunnel and Bridge: 2009 China
These mammal tracks were left by creatures like carnivorans, peccaries and rhinoceros. Mastodon tracks have also been reported, but may represent misidentifications. [1] 1902. Dinosaur footprints were discovered at Fisher's Quarry, near Graterford, Pennsylvania. These tracks are now classified in the ichnogenus Atreipus. [12] 1903
The tunnel bores through the Berkeley Hills east of Berkeley and Oakland a distance of 3.1 miles (5.0 km) [3] through a variety of rock strata, most of which are soft and porous. The earthquake-active Hayward Fault bisects the tunnel about 900 feet (270 m) inside the west portal (Oakland side).