"The problem has occurred due to damage or theft in the signaling cable measuring around 700 meter connecting the track circuits to the junction box between the Pragati Maidan and Mandi House Metro stations on the up line (towards Dwarka)," DMRC Executive Director of Corporate Communications Anuj Dayal said.
Owing to this defect, Metro trains going toward Dwarka were moving at a restricted speed of up to 25 kmph between Pragati Maidan and Mandi House stations as automatic target speed was not available to trains in this affected section.
This was because the Automatic Train Protection (ATP) system was not activated due to disruption in cable.
"This has led to slow movement of trains on Line 3/4, as DMRC is committed to ensuring full safety of its commuters," Dayal said.
DMRC's Director (Operations) Sharat Sharma constituted a three-member fact finding committee of senior officers to investigate the incident, Dayal said, adding that cable theft could not be ruled out as the reason for the fault.
Since the fault could be rectified only by physically replacing the entire cable on the affected section, he said the maintenance work would be taken up during the night hours after the passenger services are over.
To cater to the peak hour rush, DMRC inducted three additional trains from Indraprastha to Dwarka and necessary announcements were also made at the stations advising commuters about the movement of trains.
Since morning, scores of commuters faced a harrowing time as traffic on the Blue line was disrupted due to track circuit (signaling) problem.
Delhi Metro glitch hits Blue line at 8 a.m., continues till evening
Traffic on snag-prone Dwarka to Noida City Centre line of Delhi Metro was disrupted today due to signal problem, delaying scores of commuters.
"Due to track circuit (signalling) problem, between Mandi House and Pragati Maidan section, trains on Line 3/4 are running with a restricted speed of 25 kmph in this section leading to uneven frequency of trains on the route," a DMRC spokesperson said.
According to the spokesperson, the snag between Mandi house and Pragati Maidan station developed at 8 AM and the metro officials were trying to resolve it.
However, it is uncertain as to when normalcy would be restored, he said.
Meanwhile, hundreds of passengers using this Blue line metro were delayed due to bunching of trains on the route.
The Dwarka Sec-21 to Noida City Centre/Vaishali train has been hit by the circuit problem often in the past, the last time being October end and early November due to similar technical problems.
"The delay in Dwarka line has become a nuisance. Every other day there is a problem and many commuters like me get delayed for work and other things," a passenger complained.