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Fire extinguishers, with 6 Kg powder, are located at 60 metre interval along the sides of each tunnel, in pairs.
Traffic Control Centre.
The Traffic Control Centre is located at Salah Salem. The aim of the Traffic Control system is to keep the traffic in the tunnels safe in every situation. The System comprises:-
a) Lane control signal to assist drivers in cases of total or partial lane closure. These are hung from the roof centrally over each traffic lane and located before each of the emergency stations and at the curves in the tunnels.
b) Gauge control devices to detect and prevent any vehicle higher than 4 metres from entering the tunnels. These are photo-electric cells and are mounted on gantries before the tunnel entrances.
c) Rising barriers to separately close each traffic lane are located at the tunnel entrances.
d) Traffic measurement stations to collect data on vehicle counts, average speed and occupation rate.
CCTV System
The Closed Circuit Television System, which supervises vehicle movement in the tunnels and assists the emergency services actions in case of emergencies, comprises:-
a) 75 fixed video cameras at approximately 100 metre intervals.
b) 4 movable video cameras – one at each entrance and exit of each tunnel.
c) 14 monitors in total; 3 for fixed cameras; 2 for movable cameras; 2 for emergencies.
d) 1 matrix.
e) 1 CPU.
f) 4 video recorders.
Telephone System
The Telephone System comprises 2 sub-systems, covering:-
a) Emergency telephones to be used by drivers to communicate with the tunnel operators.
b) Service telephones to be used by staff internally and externally.
c) The telephone equipment comprises:-
- 68 telephone sets inside the buildings,
- 32 emergency telephone sets along the tunnels,
- 3 telephone sets for communicating with other authorities,
- 1 special telephone set for communicating with other authorities,
- 1 PABX with a capacity of 6 trunk lines and 120 subscriber lines.
Radio System
The Radio System comprises:-
a) Two operator base stations, main and back-up, located at Salah Salem and Port said Street, with redundancy switching unit, transmitters
clock reference, electro-optical interfaces and tunnel RF coupling devices, dedicated radio system SCADA and local control console PC3 for back-up use.
b) Radiating cables in the tunnels, locate on the roof.
c) Antennae located at each portal for surface access coverage.
d) Radio operation modes incorporated are:-
- General Group Call to allow the operator to call all open portables,
- Selective Group Call to allow the operator to call all open portables standing in the radio
- Individual Call to allow the operator to call a specific portable standing in the radio coverage area,
- Portable Call Operator to allow the portable standing in the radio coverage area to call the operator,
- Portable to Portable Call to allow portables in the coverage area to call another portable standing in the radio coverage area.
Fire Detection System
The Telephone System comprises 2 sub-systems, covering:-
a) The Fire Detection System in the tunnels and galleries comprises:-
- Linear Sensor of Temperature (LIST) sensor cable system.
- Sensor Control Master (SCM) Unit locate in the Salah Salem technical room controlling the 6 sensor slave control units (SSC).
b) Fire Detection System in the technical stations uses the LIST sensor cable system and provides fire alarms with the area location for each of the 4 stations – Attaba, El Hussein, Port Said Street and Salah Salem.
Supervisory Control System (SCS).
The SCS has four main functions:-
a) Supervision, monitoring and control the tunnel systems and sub-systems. By reporting to the operators, it enables supervision and commands to be made to the equipment, according to the mode, which is set.
b) Tunnel management; Data analysis, for the tunnel management.
c) System monitoring and maintenance for the technical management.
b) System software configuration
for setting up and programming the SCS, for the data processing
management.
The SCS has three different modes for operation:-
a) Automatic Mode.
b) Operation Mode.
c) Local Mode.
For availability reasons, during the fire
scenario, the Operator Mode of the Ventilation, Dewatering, Fire
Fighting, Lighting and Traffic Control systems are overridden to the
Automatic Mode, even if the operator is managing some of the
equipment in Operator Mode.
Elevators
Elevators are installed in the Ventilation Stations at:-
a) Salah Salem: 4 levels, 18 stroke, 21 Kw motor, 2 tons capacity.
b) El Hussein: 5 levels, 24 stroke, 21 Kw motor, 2 tons capacity.
c) Port Said Street: 6 levels, 21 Kw motor, 2 tons capacity.
To ensure
the safe evacuation of people from the tunnels, in the case of a
serious incident, there are fireproof escape cabinets located at the
side of each tunnel, every 100 metres. These are connected by escape
chutes to galleries under the roadways, which lead to the
ventilation stations. During a serious incident, signs will direct
people to the escape cabinets from where they can access the
under-road galleries in safety. The galleries will be positively
pressurised with fresh air, during emergencies and emergency signs
will lead people to the ventilation stations. Elevators and
stairways at these ventilation stations permit safe passages to the
surface.
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