Safety first inside Metro tunnel
In eight minutes flat, as Namma Metro’s east-west corridor train completes that 4.8km stretch, commuters might harbour a nagging thought: what if the train stops suddenly inside the tunnel. Is it safe enough? To banish that thought, a team from Deccan Herald went underground checking out all the safety measures in place. Tunnel-walking from the Cubbon Park station till the Vidhana Soudha stop 400 metres away, the team noticed a walkway at a three-metre elevation from the track. Attached to the tunnel wall on one side, it ran the full distance between the stations. The walkway had a clear purpose: quick evacuation. But what about the air? The Metro engineers were sure, the air-conditioning within the coaches would suffice to keep everyone inside comfortable for 20 to 30 minutes. Once the commuters get onto the walkway, the Tunnel Ventilation System (TVS) will do the trick. Simply put, the TVS is about blowing air into the tunnel from one station and taking it out from the next o...