Pune’s underground tunnel plan advances as the PMC approves a DPR consultant for proposed Bhosari-Undri and Bhugaon-Erandwane corridors. The Pune underground tunnel project proposes 31 km across two corridors. Here is what the plan reveals about traffic, feasibility and urban coordination. Pune: The PMRDA has directed its consultants to evaluate six to seven alignment options for the proposed Rs32,000-crore underground tunnel network before finalising the detailed project report.