The Green Tunnel Bypass for Shiradi Ghat on Bengaluru-Mangaluru National Highway 75 was found to be not viable. As an alternative, the National Highways Authority of India (NHAI) has been tasked o prepare a detailed project report for a 26km long four-lane road. 

https://www.thehindu.com/news/cities/Mangalore/nhai-to-widen-shiradi-ghat-to-four-lane-after-tunnel-bypass-project-found-not-viable-says-nitin-gadkari/article66243634.ece