Finally, the last touches, such as tiling the inside, were completed. Ventilation is supplied by three automatic high-speed Westinghouse Sturtevant blower fans. Located on top of the Tunnel, the fans provide complete air exchange within 2 minutes. These fans are designed to keep the air free from high levels of carbon monoxide. In the event of electrical failure, a generator can support the electrical needs of the Tunnel.
Every twelfth light is powered by a generator.
The light intensity at the portals is three times brighter than the interior. This prevents temporary blindness, when entering the Tunnel. Flooding is practically impossible. Pumps located under the road surface drain the water back into the ship channel. As to this date, the Tunnel has never been flooded.