Above: St Mary's Bay (northern) tunnel portal. With fire hydrant, fire hose reel and emergency telephone box.

Above: St Mary's Bay (northern) tunnel portal with the existing Fanshawe Street on-ramp to the left (which will be reinstated as a PM peak lane).

Above: One of the many fire escape doors that line the western side of the tunnel. Each section of the tunnel is identified by zones,
if a serious incident occurs within a zone fire protection equipment and fan systems will activate (if needed).

Above: Escape passage which runs the length of the tunnel on the western side, people that have left the tunnel from
the doors (above) will use this pressurised tunnel to access one of the two egress stairwells to the ground above.
Above this passage is a similar service/maintenance passage.

Above: Jet fans along the ceiling of the tunnel will be used to clear pollutants and also assist in fires.

Above: 1. Flood lights line the tunnel, especially at the entrance portal, where light sensors will identify external light
(bright sunshine, gray cloud, sunsets, nighttime etc.) and match that with lights within the tunnel.
This will avoid harsh light changes which can result in driver distraction.
2. Sprinklers line the ceiling, which can be used to control fire.
3. A transmitter line runs the length of the ceiling, this will allow continuous cell phone and radio coverage and in an emergency will
allow traffic operators to alert drivers of emergencies over the top of normal radio broadcast.
4. Heat sensors line the tunnel ceiling, which will alarm if excess heat is recorded.

Above: Large extent of the tunnel length, viewed from the southern end (entrance portal).

Above: Looking south at the entrance of the tunnel, the Wellington Street on-ramp is to the left of the image.