In some years, when commuters take a trip in Chennai Metro Rail system from Koyambedu to St Thomas Mount, the practice will snake by means of a zigzag path and maneouver among the sharpest curves earlier than reaching the vacation spot.
Not simply this stretch, there are quite a few sharp curves within the 116 km part II venture and it is without doubt one of the major explanation why Chennai Metro Rail practice can be operated at a slower common pace of 32 kmph when in comparison with the common pace of 34 kmph in part I venture.
According to officers of Chennai Metro Rail Limited (CMRL), there are sharp curves in varied places together with Koyambedu, Manjambakkam, Porur, Alwarthirunagar, Alapakkam and Alandur. Across the part II community, the sharp curves are current for almost 16 km (in several stretches) in contrast to part I venture the place it exists just for a mere 4.9 km, an official stated.
“When the radius of the viaduct dips below 190 metres, the curve becomes quite sharp. While in Alandur the radius of the curve is as sharp as 125 metres, in Koyambedu it is 127 metres. The reason why we chose to go ahead with the existing alignment despite the sharp curves is to reduce land acquisition. For instance, during the planning stage, we knew that in the proposed alignment there is a sharp curve near Porur Junction and Alapakkam, we still decided to go ahead with the alignment. This is because, if we had to avoid the curve and change the alignment a little, it means we would have had to acquire more land,” he stated.
But to make sure security isn’t compromised and practice doesn’t derail in these sharp curves, Chennai Metro Rail plans to repair ‘check rails’ close to the tracks. “The ‘check rails’ are rails which we use when the radius drops below 190 metres. This apart, there will be adequate greasing of the train wheels too. These two measures help the train the negotiating the sharp curves. They will aid in reducing the screeching noises that commuters will hear when trains cross through sharp curves,” one other official stated.
Sources stated, when the practice operations begin in part II community, if commuters shouldn’t have the inconvenience of screeching noises like it’s occurring part I community, there also needs to be common upkeep of tracks other than the measures that’s being taken now.
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