Wildlife corridors connecting fragmented habitats allow animals to move, disperse, and find mates. Well-designed corridors reduce mortality from vehicle strikes and improve population welfare.
Habitat fragmentation forces wildlife into dangerous road crossings and isolates populations in patches too small for healthy long-term survival. Individual animals that attempt to cross roads face vehicle strike mortality that represents acute welfare harm at large scale. Populations trapped in isolated habitat patches face the chronic welfare consequences of inbreeding and resource limitation. Wildlife corridors address both welfare and conservation simultaneously. The capital cost of wildlife crossing infrastructure is high but the welfare and ecological benefits are substantial and long-lasting. Road mitigation planning is increasingly evidence-based with species-specific effectiveness data.