Kolkata Metro created history on Wednesday when its rake ran through a tunnel under a river for the first time in the country, a senior official said here.
The Metro rake which had only officials and engineers on board ran under the Hooghly from Kolkata to Howrah on the other side of the river.
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This is a “revolutionary step” in providing a modern transport system to the people of Kolkata and its suburbs, the official said.
Metro Railway General Manager P Uday Kumar Reddy and other senior officers travelled from Mahakaran station in Kolkata to Howrah Maidan station in the rake.
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