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Wildlife crossings, whether overpasses or tunnels, allow animals to —traversetraversingtraversedtraverses busy motorways without risking collisions with vehicles. Engineers plant native vegetation along the structures so that species do not —perceiveperceivingperceivesperception them as unnatural barriers. Studies indicate that such crossings significantly —lowerloweringloweredlow roadkill rates while also reconnecting fragmented habitats, which helps maintain genetic —diversitydiversediversifydiversification within isolated populations.