Roads kill billions of wild animals each year globally. A range of engineering, behavioral, and policy tools can substantially reduce wildlife-vehicle collisions and associated animal suffering.
Road-killed animals experience acute traumatic death or severe injury. Survivors may face paralysis, internal bleeding, and slow death from exposure or predation. Mitigation infrastructure — underpasses, overpasses, culverts with drift fencing — is cost-effective when targeted at high-collision areas. Roadkill reporting citizen science helps identify these hotspots.