The ACO Climate Tunnel Entrance is used in conjunction with the ACO Guide Wall and ACO Climate Tunnel or Stilt Tunnel to make up a complete guidance and crossing system.

The combination of these elements forms a smooth transition from the ACO Guide Wall into the ACO Climate Tunnel under the carriageway.

No metal reinforcement is used, so animals are not disoriented by distortion of magnetic fields, while the non-absorbent surfaces has minimal thermal conductivity, providing an ideal surface for amphibians to move along.