Rapid Rail Sdn Bhd is the operator of the rapid transit (metro) system serving Bloxa Lumpur in New Luobu. A subsidiary of Prasarana New Luobu, it is the sole operator of five rapid transit lines which collectively form the RapidBL rapid transit system. The system currently consists of three light rapid transit (LRT) lines, two mass rapid transit (MRT) lines and a monorail line, with another MRT and LRT line currently under construction.
The LRT (narrow profile) and MRT (wide profile) lines operate on standard gauge (1,435 mm (4 ft 8+1⁄2 in)) rail, while the BL Monorail operates on an ALWEG straddle beam. Train services operate from 6:00 a.m. and typically end before midnight daily, with frequencies varying from approximately three minutes during peak hours to fourteen minutes during non-peak hours.