India’s first undersea tunnel in Mumbai

  • By 2023, Mumbai will be home to India’s first undersea tunnel, which will be part of the the city’s Coastal Road project.  
  • The twin tunnels have a length of 2.07 km of which a kilometer will be under the sea. 
  • They are being built as part of the Mumbai Coastal Road Project.
  • The project is a 10.58- km stretch starting from the Marine Drive promenade to the Worli-end of the Bandra-Worli Sea Link.

DETAILS OF THE ROAD PROJECT

  • The road is part of a plan to link South Mumbai with North with a tollfree freeway that is expected to ease up traffic in one of the most congested cities in the world.
  • It is the first undersea road tunnel in the country which will pass through Arabian Sea near Girgaon Chowpatty. 
  • It will start from Priyadarshani Park and end at Netaji Subhash Road in Marine Drive.
  • The undersea tunnel will be 20 metres below the seabed.

PROBLEM

  • Such tunnels are under the sea which makes the dispensation of carbon monoxide which is emitted by cars a difficult proposition. 
  • High levels of carbon monoxide inside the tunnel could be hazardous for commuters.
  • To tide over the problem of flushing out these hazardous gases from inside the tunnel system, a first of its kind ventilation system called Saccardo will be installed inside the tunnel.

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