chennai in an effort to discourage passengers from nonessential travel and protect themselves against covid19 chennai metro rail limited has curtailed services from march 23 to 31 trains will operate only between 6am and 10am and from 4pm to 8pm in a release cmrl said trains operating from 6am to 8am are restricted only to citizens engaged in essential services and from 8am to 10am office goers on essential duties could use the servicesfrom 4pm to 8pm citizens and office goers engaged in essential services and duties can use the facility metro train services will not be available from 430am to 6am 10am to 4pm and from 8pm to 11pmthe steps have been taken in public interest and is to discourage nonessential travel the release said