Secunderabad–Bolarum route

The Secunderabad–Bolarum (abbr. SB) is a suburban rail service of the Multi-Modal Transport System of Hyderabad, India. Spanning 11 stations, it runs between Secunderabad and Bolarum 5 times a day.

History
The Secunderabad–Bolarum route is one of the oldest suburban rail in the city of Hyderabad, established by Nizam's Guaranteed State Railway. Initially, it was a metre-gauge track but was later converted into broad-gauge.

MMTS route
Secunderabad–Bolarum route is scheduled to take off as a part of the phase 2 of the Hyderabad Multi-Modal Transport System in December 2018., however was delayed due to paucity of funds. The work of the section is nearing to completion in February 2020. .Finally, 13 MMTS Services along 2 routes under the MMTS phase 2 was inaugurated on 8th april 2023 on Secunderabad medchal & Falaknuma Umdanagar routes by PM Narendra Modi.

Electrification
Railway electrification system of the 13   km long route was  completed in 2018 by South Central Railway.