Amphibian tunnels with drift fencing, installed beneath roads at migration hotspots, provide permanent solutions to toad road mortality that complement volunteer patrol efforts.
Amphibian tunnel infrastructure provides permanent welfare protection that operates year-round regardless of volunteer availability. Roads that bisect traditional migration routes cause mortality of thousands of toads annually at a single crossing point — a concentrated welfare cost that tunnel systems can largely eliminate. The long-term welfare return on tunnel investment is substantial, as populations recovering from road mortality pressure can rebuild over years to decades. Highways authorities and local councils that install tunnel systems at identified crossing points make a lasting commitment to preventing preventable wildlife suffering at those sites.