The 12533 / 12534 Pushpak SF Express is a Daily Superfast Express category train belonging to Indian Railways that runs between Lucknow Junction In Uttar Pradesh and Chhatrapati Shivaji Maharaja Terminus, Mumbai in Maharashtra, India.Pushpak SF Express is the fastest train between CSMT in Mumbai and Lucknow in Uttar Pradesh covering distance of 1428 km in 22.5 hours.With progressive electrification of the Lucknow–Jhansi sector, Bhusawal-based WAP-4 began hauling the train until from Lucknow Junction to Igatpuri, following which a WCAM-3 took over for the remainder of the journey until Mumbai CSMT.With Central Railway completing the changeover of 1500 V DC traction to 25 kV AC traction on 6 June 2015, the train was to be hauled by WAP-4 but from 2016, this train is now end to end hauled by an Ajni-based WAP-7 locomotive.[1] As with most train services in India, coach composition may be amended at the discretion of Indian Railways depending on demand.