The ‘Online Passenger Reservation System’ (OPRS) of the Andhra Pradesh State Road Transport Corporation will remain closed across the State on April 3 owing to annual maintenance, according to RTC Guntur Regional Manager P.V. Rama Rao. OPRS will remain closed from Wednesday midnight to Thursday 6 p.m. Passengers who want to cancel online tickets can do so by logging on to online.support@apsrtconline.in.