The unique feature of this project is the 3 km double-deck
motorway within the stormwater tunnel. The operation
of the SMART system works on the three- principle
mode of operation based on the flood discharge at
the Klang River/ Ampang River confluence and the operation
status of the motorway.
|The first mode, under normal condition where
there is no storm or low rainfall, no flood water
will be diverted into the system.Under the second
mode, SMART system will be activated and this
happens when there is moderate storm.
When the second mode is activated, flood water is
diverted into the bypass tunnel in the lower channel
of the motorway tunnel and it is important to note,
that, up to this stage, the motorway section is still
open to traffic.
At the third mode of operation the motorway will
be closed to traffic. With extensive and effective
monitoring stations, when the third mode of operation
is needed, the motorway will be closed to traffic.
Sufficient time will be allocated to allow the last
vehicle to exit the motorway before the automated
water-tight gates are opened to allow flood water
to pass through. The motorway will be reopened to
traffic within 48 hours after the closure.
Ventilation/ escape shafts at 1km intervals: these
powerful air ventilators will constantly renew the
air and maintain the air quality within the motorway.
To protect the ventilation system during the flooding,
the systems consist of a series of shafts each containing
an exhaust and fresh air injector. This design enables
the fans to be situated outside the SMART tunnel to
create a longitudinal flow in the tunnel between the
shafts that permits the air in the tunnel to be continuously
renewed and to enable extraction of the exhaust fumes.
The feature also allows for smoke control in the event
of a fire.
Equipped with fire fighting, telecommunication and
surveillance equipment at 1 km interval.