RVNL emerges as L1 bidder for provision of ABS system for Jolarpettai-Erode rail section April 25, 2024 | Awarded, Project Updates Rail Vikas Nigam Limited (RVNL) has emerged as the lowest (L1) bidder for provision of Automatic Block Signalling (ABS) in Jolarpettai junction to Erode junction of Salem division. This content is restricted.