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Continue to ChatChennai metro holds fresh trial run for trains at 2.5 mins frequency https://www.primetimes.in/news/375205/chennai-metro-holds-fresh-trial-run-for-trains-at-2-5-mins-frequency/
Chennai metro holds fresh trial run for trains at 2.5 mins frequency https://www.primetimes.in/news/375205/chennai-metro-holds-fresh-trial-run-for-trains-at-2-5-mins-frequency/