The Clem7, Legacy Way and AirportlinkM7 are three of Australia’s safest tunnels. Tunnel safety feature include:
- Variable speed and message signs to direct motorists if there is an incident
- CCTV inside the tunnel to detect and alert tunnel operators to any variations in normal traffic flow
- emergency telephones located every 60 metres along the tunnel. These connect directly with Tunnel Control Centre (TCC) staff who coordinate roadside or emergency assistance 24/7
- Radio re-broadcast systems to enable tunnel operators to broadcast messages over a vehicle’s AM or FM radio band
- Emergency barriers and stop signs at the tunnel entry points should the tunnel need to be closed at any stage
- Cross passages that act as emergency exits for quick evacuation in the unlikely event of an emergency
- Advanced fire safety systems, including heat detection, fire sprinklers, hydrants, extinguishers and hose reels
- Air quality monitoring systems.
The Clem7, Legacy Way and AirportlinkM7 all consist of two parallel tunnels approximately 10 metres apart. The two tunnels are connected by cross-passages along the entire length of the tunnels.
If an incident occurs in one tunnel, motorists can use the nearest cross-passage to exit into the other tunnel. In the event of an incident motorists should follow any instructions provided over the PA system.
Each of the cross-passages features a white “running man” sign on painted green background, and is individually numbered and identified by directional signs.
Tunnel safety equipment
Some of the key fire and life safety features that will be in operation 24 hours a day include:
- Heat detection system and alarms. These systems automatically advise the TCC and Queensland Fire and Rescue Service (QFRS) that there is a fire
- Fire water system fixed to tunnel ceilings that has the capability to dump high volumes of water in the area of a fire if necessary
- Fire hydrants, hose reels and fire extinguishers which are located at regular intervals along the tunnels
- Emergency Telephones located every 60 metres inside the tunnels to provide direct contact with tunnel operators
To ensure tunnel safety the following vehicles are not permitted:
- vehicles and loads exceeding 4.6m high
- vehicles carrying commercial quantities of dangerous goods
- any vehicle displaying a dangerous goods placard
Detection systems outside the tunnel notify drivers of height limits. Warning signals are initialised if the height limit is breached. All vehicles exceeding the height limit will be advised to take an alternate route.
If drivers of over height vehicles proceed, entry will be prevented by an over height barrier structure.