Chennai to Mumbai golden quadrilateral can be reorganised as chennai-Jolarpet-Bangalore-Guntakal-wadi-Pune-Mumbai along with the shortest route of Chennai-Renigunda-Guntakkal -Wadi-Pune -Mumbai...
Muimbai-Pune-Miraj-Londa-Hubli-Gadag-Bellary-Gundakal-Chennai route also considered and developed as Diverted Golden Quadrilateral of Mumbai-Chennai