Green transportation systems for any city are the obvious demand of modern times in terms of economic, social and environmental aspects bearing the recent global phenomenon of climate change. Thus it has become a challenge for the decision makers to evaluate and select the suitable transportation options. In this research, two MCDA approaches namely AHP and Fuzzy TOPSIS have been discussed for selecting the best sustainable transport options (both High and Low cost) for the Megacity. To come across a reliable solution, a list of criteria has been selected for the two approaches i.e. Five broad criteria for AHP and Twenty-one specific criteria for Fuzzy TOPSIS approach. Then the potential alternatives (Three High Cost and Three Low Cost) have been rated by the Experts with respect to each of the criteria in separate way for the two approaches. Finally, the AHP and fuzzy TOPSIS method have been applied to produce aggregate scores for the evaluation of sustainability criteria and choosing the appropriate alternative for both categories.