All heavy vehicles have been diverted via other routes. Meanwhile, PWD officials could not confirm why or how the cave-in occurred.
The area saw a brief rain spell on Tuesday, though no waterlogging was reported on this stretch in the past few days.
According to the police, the area was cordoned off in time to prevent any untoward incident, and concerned departments have been apprised of the incident.
The traffic police have also received information about the congestion from Pankha Road in Janakpuri and on the road coming from Mangolpuri towards Janakpuri.