Gurugram, July 8 -- A large portion of the road on the Delhi-Gurugram Expressway caved in near Narsinghpur at around 4.30pm on Tuesday, forcing the closure of two lanes on the Delhi to Jaipur carriageway and triggering massive traffic congestion on NH-48. Highway officials said the road was damaged at a location where the Gurugram Metropolitan Development Authority (GMDA) was laying pipelines beneath the highway to divert storm water towards the Badshahpur drain. An NHAI official said the damaged stretch has been barricaded and traffic marshals deployed to prevent any untoward incident. The cave-in, which occurred in front of the Sun Beam Auto company, brought traffic to a standstill between Rajiv Chowk and Narsinghpur. Gurugram traffic police issued an advisory asking commuters travelling towards Manesar and beyond to use the Southern Peripheral Road (SPR) instead of the Delhi-Jaipur highway. Yogesh Tilak, project director, NHAI, said the authority's team reached the site immediately after receiving information and closed traffic on the damaged stretch. "The road has been damaged in the middle, so two lanes on the expressway have been barricaded. We've also deployed traffic marshals to manage traffic, but the situation is really chaotic as congestion was already heavy due to rainfall," he said. Tilak said the road apparently caved in due to GMDA's ongoing pipeline-laying work to divert rainwater to a newly constructed drain connected to the Badshahpur drain. He added, "We are working to repair the damaged stretch overnight so that all lanes are motorable by Wednesday morning." GMDA officials said the Narsinghpur stretch has witnessed severe waterlogging every year for the past 15 years. To address the issue, the authority, with NHAI's consent, decided to lay three pipelines across the highway to divert rainwater to a newly constructed drain at Radhakrishan Krishna Garden. Vikram Singh, executive engineer, GMDA, said two of the three pipelines had already been laid. "The authority had managed to get two pipes across the highway, but while laying these pipes, two high-tension power lines were shifted, and due to that, rainwater seems to have seeped under the road, which led to the cave-in. We're on spot and taking immediate measures to repair the damage," he said. The traffic police advised commuters from Delhi bound for Manesar and Jaipur to use SPR via Rajiv Chowk or the Dwarka Expressway to avoid the affected stretch....