Common toads migrate annually to ancestral breeding ponds, crossing roads that now fragment their routes. Volunteer patrols and toad tunnels are saving thousands of lives each year.
Toads struck by vehicles die from traumatic injury. Those that reach roads but cannot cross may be exposed for extended periods waiting for traffic. Patrols create a safe crossing window but cannot provide 24-hour coverage. Purpose-built tunnels with drift fencing provide permanent infrastructure that eliminates road mortality without ongoing human intervention.