Tehran City 4K, Tohid Tunnel South to North, Driving Tour in Summer 2020 | تهران، تونل توحید

Tohid (or Towheed) Tunnel is a tunnel in Tehran, Iran, the third longest urban tunnel in the Middle East. Towheed Tunnel Project is an urban underground structure, located within the area of Chamran Highway, Towheed Square, Jomhouri Square, and Navab Highway, with a length of about 3 km (Tunnel + entry ramps). Tohid Tunnel broke construction records when it was opened in less than 30 months. The interior designs met the highest safety requirements. It includes installation of utilities equipment in the Tunnel, and manufacture and mobilization of north and south fans combined ventilation equipment, and control building and Niyayesh shaft.

The construction site of this Project was located within the distance between Fatemi Ave. in the north of Towheed Square, and Navab Highway in the south of Azerbaijan street junction.

Subsequent to studied on the Comprehensive Plan of Tehran, in order to make an easy access from the north to the south of Tehran and vice versa, along the north-south corridor, between Chamran Highway constructed during the 70s, and Navab Highway constructed during the 90s, sufficient studies were made by Tehran Municipality in 1998 so that the connection of the said two Highways, i.e. to fill the gap between Towheed Square to Jomhouri Square becomes practicable and operational.

The significance of the above issue, the congested traffic on Tehran highways, and the intense exigency of Tehran as a metropolitan city to have the above Highways connected, made Tehran Municipality to launch exhaustive studies to tackle such purpose, and by comparing the existing alternatives, the best alternative which was construction of a tunnel similar to Tehran Ressalat Short Tunnel, was adopted and approved.

To this end, in early 2007, a Contractor (Perlite) was assigned to construct the Project, and on 11.06.2007 the contract to kick off the Project was signed and notified to the Contractor, whereby on 19.06.2007 the construction works of Towheed Tunnel Project were actually commenced.

Video Timeline:
00:00 Trail Map | نقشه مسیر
00:19 Navvab Highway | بزرگراه نواب
00:28 Tohid Tunnel | تونل توحید
03:40 Chamran Highway | بزرگراه چمران
03:58 Trail Map | نقشه مسیر

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