Within the Marão Tunnel, the longest road of the Iberian Peninsula with 5.6 kilometers, invested in a sophisticated security system that includes a video surveillance circuit and automatic detection of incidents.
Seven years after the start of construction of Vila Real and Amarante, Freeway Marão – Marão Tunnel is inaugurated Saturday allowing the connection to Highway 4 (A4) to Porto and Bragança <. / p>
inside the tunnel, ripping the mountains of Marão, the bet was in maximum security. The infrastructure comprises 18 active security subsystems that work together and are managed by a sophisticated automation system.
André Oliveira, the project coordinator, told the Lusa agency that the whole tunnel is covered by a system video surveillance with 126 cameras, and automatic detection of incident.
in case of malfunction, the car stopped or fire, the nearest camera site focuses on the fault, pull the situation to the ‘video wall’ the control center where permanently are two operators.
it is the system itself that suggests ways of acting according to the severity of the occurrence and the emergency procedure that should be taken.
operators can communicate with users through the light information panels, the loudspeakers installed along the structure or by radio, since the message can stop the emission of the four stations that can be heard inside.
throughout the extent there are two bridges to route users for 13 emergency passages, six of which allow the passage of vehicles for other gallery that may be closed for the removal or passage of emergency vehicles.
the project includes two tunnels, two twin galleries, which were built in parallel.
André Oliveira stressed that the Marão Tunnel “meets all safety requirements” and in some situations, goes up beyond what is imposed by law, such as the level of the mouths-of-fire are placed 180 to 180 meters (the law imposes 200), or in emergency galleries that distance 400 meters ( law establishes 500).
inside there are 82 SOS posts, 470 speakers, mobile phone network to facilitate communications and were installed 72 fans.
the tunnel has a water column which runs long and feeds the mouths-of-fire, even opacity sensors, gases such as carbon monoxide and nitric oxide, temperature differences, speed measurement, guidance and lighting.
All of these systems are designed to maximum safety of the tunnel and gathered information on past situations. In 1999, inside the Mont Blanc tunnel between France and Italy, a truck caught fire and 39 people eventually die due to smoking and elevated temperatures.
Among the differences in the two tunnels is for example existence of two galleries in Marão, while the Mont Blanc has only one.
Inside the transmontano tunnel will be on hand 24 hours a day, two operators have assistance vehicles equipped with first intervention means.
According to Infrastructure Portugal (IP), complete the tunnel cost 88 million euros, of which about 17 million were reserved for safety equipment.
Digital Daily with Lusa
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