A 10-metre deep crater was formed on Raisina Road, near Central Secretariat, after Friday’s heavy downpour.
Delhi Metro Rail Corporation (DMRC) is constructing an underground metro section (Central Secretariat - Badarpur line) and the road was opened for traffic just few days back after the Metro completed the tunnel work.
DMRC spokesperson Anuj Dayal said water came out of a manhole with huge pressure and washed away the road and part of the footpath. "Restoration work has started and the road will be reopened for traffic by Monday," Dayal said.
There were reports of damage to roads, flyovers and footpath from several other parts of the city. A part of road caved in near western extension area in Shadipur in West Delhi. Though no one was injured in the incident, it led to a massive traffic jam.
According to a senior MCD official, the agency that maintains the road, Delhi Jal Board, had recently laid down a sewer line under that road.
"The road was cut to lay a sewer line and it was restored recently. If it has still caved in that means the restoration work was shoddy," said the official, who requested anonymity.
A slip road along the Kasturba Gandhi Marg in Central Delhi and parts of a flyover near Nand Nagari on Wazirabad Road in North-east Delhi were also damaged after heavy rain.
According to SM Sarin, former director of Central Road Research Institute, poor drainage system is one of the biggest reasons for roads caving in.
"Due to poor drainage, water does not clear and seeps into the road, making it weaker and its traffic bearing capacity also reduces," Sarin said.