Spot on thinking hai aapki. Kaash Railway Bhi aisa kuch soch paata. Na jaane kab Tunnel me kuch problem aa jaaye as ye kaafi puraana ho chuka hai. Ye U-link banne se temporarily Tunnel ko avoid kar sakte the. Aur kuch mahine ke mega block ke saath full repairing aur ek new tunnel bhi banana shuru kar dete. Tab blasting se hone waale problems bhi nahi aate. Naye tunnel ka to kuch ata-pata bhi nahi hai ki ye kahan aur kab banega.. :(