It's not a plane, it's not a train, it's not a bus. It's abit of all three and some more. The Konkan Railway Corporation Limited has drawn up a plan to bring the "Sky Bus Metro" (SBM) to Indian cities. The SBM can bring travel cost drown to 15 paise for a kilometre, B Rajaram, the managing director of the corporation, claimed at a seminar on mass rapid transit systems in the CII-hosted Indian Railway Equipment Exhibition here.