 Thales Group supplied its SelTrac Communications-based train control (CBTC) technology, and trains initially run in automatic train operation mode with minimum headways of 90 seconds, although the system will support eventual migration to unattended train operation (UTO).On 12 September 2012, Larsen and Toubro Metro Rail Hyderabad Ltd (LTMRHL) announced that it has awarded tender for supply of rolling stock to Hyundai Rotem.The tender is for 57 trains consisting of 171 cars which will be delivered in phases at least 9 months before the commencement of each stage.