Wildlife Road Mitigation Infrastructure

Wildlife crossing structures including underpasses, overpasses, and culverts enable animals to cross roads safely, reducing mortality and enabling population connectivity.

Key Facts

Wildlife crossing structures reduce road mortality by 80-95% for target species when appropriately placed
Banff National Park's wildlife overpasses have enabled wolf and bear population connectivity across the Trans-Canada Highway
Amphibian tunnels at known crossing sites reduce frog and toad road mortality significantly
Mitigation is most cost-effective when integrated into road design rather than retrofitted

Welfare Considerations

Wildlife crossing infrastructure prevents the traumatic deaths and injuries suffered by animals struck by vehicles. Beyond individual welfare, crossings maintain population connectivity that is essential for genetic diversity and range adjustment to climate change. The welfare case for crossings is compelling but must be translated into infrastructure investment decisions dominated by cost-benefit analysis. Citizen-contributed roadkill data helps identify the hotspots where investment delivers maximum welfare and ecological return. Integration of wildlife crossings into new road design is far cheaper than retrofitting, making planning advocacy a high-leverage intervention.

What You Can Do

Submit roadkill data through citizen science apps to identify crossing hotspots
Engage with local road authorities about wildlife crossing provision in new developments
Support national programmes for systematic wildlife crossing assessment and installation
Advocate for wildlife crossing requirements in environmental impact assessments for road projects