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The Engineering of Wildlife Crossings
[Note that this article is a transcript of the video embedded above.] This is the Wallis Annenberg Wildlife Crossing under construction over the 101 just outside Los Angeles, California. When it’s finished in a few years, it will be the largest wildlife crossing (*of its kind) on the planet. The b
The sides of highways have clear zones kept free from trees and similar obstacles for vehicle safety, but the lack of shade allows tender greens to thrive, creating a salad bar for species from monarch butterfly caterpillars to white-tailed deer. There are lots cases that just don’t get counted, like if an animal is too small to notice, or if it survives the impact and escapes, or is collected by somebody practicing the dubious art of roadkill cuisine (yes, that’s a real thing and there are multiple cookbooks out there for it). Engineers and ecologists use a wide variety of mapping, including aerial photography, land cover, topography, habitat, plus ecological field data and even roadkill statistics to choose the most appropriate locations for new wildlife crossings.
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