4Additional requirements#

4.1CCTV coverage#

In addition to the requirements set out in the previous sections, full CCTV coverage of the following areas is to be provided and shall be able to be viewed directly from both the Tunnel TMC and the Transport and Main Roads' Regional TMC to allow manual assistance / intervention during a closure:

• section/s of the mainline affected by the tunnel warning devices
• the diverge from the mainline to the tunnel ramp
• entire length of the tunnel ramp from the diverge to the tunnel portal
• turnaround facility, and
• tunnel portal.

4.2Uninterruptible power supply#

All traffic management systems and devices outlined in this guideline are considered by Transport and Main Roads to be critical tunnel infrastructure. As such, these systems and devices shall be backed up by a UPS system/s to allow full operation of all critical infrastructure (including VMS display) for the greater of the time nominated by the Fire Engineering Design Brief and two hours. The UPS may be fed by a diesel generator.