Ten air-conditioned local train services started on the Chhatrapati Shivaji Maharaj Terminus-Kalyan section here from Thursday, replacing the ordinary suburban services. This is the first time that the Central Railway (CR) introduced AC locals on its main line, where services are operated from the CSMT to Kasara and Khopoli. The CR was operating AC local train services on its Thane-Vashi/Panvel trans-harbour line before the coronavirus- enforced lockdown came into force in March this year.