Alborz Tunnel - 6400 m

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largest tunnel in the Middle East.
Alborz tunnel pioneer in Tehran- North Freeway is the largest tunnel in the Middle East.
The last phase of the excavation of the tunnel at an altitude of 2,400 meters (6,400 meters) Central Alborz Mountains is made,
Alborz tunnel leading in terms of engineering, technology and most complex road construction project and its length is 2, and 7 am to hive tunnels.
In the course of digging the tunnel 145 large and small faults, immunization and more than 39 thousand liters of water per minute and pressure gases, sulfur dioxide and carbon monoxide contained.
Geological studies for the construction of the freeway north of Tehran and other achievements is the construction of the tunnel.
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Alborz tunnel connecting piece to piece Number 2 Tehran- North Freeway and operation of a two-piece, two-hour route Tehran-Chalus road toll bridge will be reduced to less than half an hour.
Alborz tunnel leading to cost 650 billion rials has been made within 46 months.
The construction of this tunnel 100 experts were working inside a big success for the country's engineering community.
Alborz tunnel leading to the end of construction, the construction of two tunnels along the path to sweep it begins.
Alborz tunnel with the aim of creating access road leading to the construction of the main tunnel, transfer and transit passengers in an emergency in an emergency and transition facilities in the Tehran- North Freeway, built.