Traffic authorities and civic officials promptly barricaded the stretch to avert any accident. (Express Photo) For the sixth time since 2023, a portion of the Rs 2,000-crore elevated corridor in Sohna that connects Rajiv Chowk in Gurgaon with the Delhi-Mumbai Expressway caved in on Wednesday morning. It is one of the busiest arterial roads in the National Capital Region (NCR). The latest collapse, on a stretch near the S D Adarsh Vidyalaya, formed a massive crater — estimated to be 10-foot-wide and 20-foot-deep — metres away from the spot where a similar sinkhole had emerged last June. Traffic authorities and civic officials promptly barricaded the stretch to avert any accident. Officials have attributed the recurring road collapses to a severely damaged 1,800-mm master sewer line running underneath the highway. Although the sewer network was officially transferred to the Gurugram Metropolitan Development Authority (GMDA) in 2022, comprehensive rehabilitation of the pipeline remains in limbo.…