Until 1973 only two out of the four southern capitals had direct rail connectivity to the national capital. One is 15/16
Grand Trunk Express from Madras and another is 21/22 Southern Express (today's
Dakshin Express) from
Hyderabad since 1955. The New Train 123/124
Andhra Pradesh Express (Now Telangana Express) was introduced on 3 October 1976, from
Secunderabad to
New Delhi and inaugurated by Madhu Dandavate who served as Minister of Railways. It was called as
Blue Bullet due to its unique livery in Oxford Blue colour coaches with a gold band in 1976. After the Formation of
Telangana State,
Andhra Pradesh Express has been renamed as Telangana Express with effect from 15 November 2015. Telangana express was updated with brand new German design
Linke-Hofmann-Busch coaches, replacing the
ICF coach design CBC coaches from 15 July 2019. ==Schedule and service==