Nna dat is correct
But giving a daily to coimbathore will benifit the trio of Coimbatore tiruppur erode and will run full for sure
The southern tn can surely altogether fill a lond distance train to the country's capital and other cities enroute, now if theres a demand they may come to chennai and slowly chennais share of quota will get affected and moreover any train starting at chennai will benifit only the capital city and adjacent places but a train from south is benefiting entire tamil nadu plus an alternative for chennai...
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It is ridiculous to not gv trains fr high revenue earner and busy cet trio than gvng trains fro places in tn to north which they dont evn knw