Signalling system on Blue Line under pressure: DMRC

Technical glitches and overcrowding on the Blue Line are here to stay as the Delhi Metro grapples with a signalling system with a "slower recovery time". According to DMRC officials, unforeseen expansion of the over-50-km Blue Line (Dwarka Sector 21 to Noida City Centre/ Vaishali), resulting in heavy commuter load, has put unexpected pressure on its signalling system.