According to railway officials, the first block will be undertaken between 1:40 am and 3:40 am on the night of May 1–2, covering the up and down South-East lines between Kalyan and Ambarnath, excluding both stations

During this period, PRS services, coaching refund services, and other facilities such as IVRS, current reservation, chart display, touch screens, refund counters, and coaching refund terminals will not be available, CR said