Mumbai GMLR project update: The ambitious Goregaon-Mulund Link Road project has reached a major milestone, with the second TBM now digging under the SGNP. The ambitious GoregaonMulund Link Road GMLR project in Mumbai has reached a major milestone with the second tunnel boring machine TBM named Vihar commencing excavation on November 7 an official statement saidThe excavation work on both underground tunnels beneath Sanjay Gandhi National Park SGNP is now underwayThe development.