The Patna Metro Phase 1 progressed as Larsen & Toubro’s TBM-1 (DZ1090) breakthrough at the PMCH Station of Line 2. This line spans 14.05 km from Patna Junction Railway Station to New ISBT. The TBM-1 was a breakthrough under Package PC-03, an 8 km underground site that connects Rajendra Nagar and Patna Junction Railway Station on Line 2.