The whole world is moving away from petroleum based transportation. One can be sure that the cost of operating the metro will not be as high vis-a-vis a bus with cng/petrol when Iran is attacked by the US. The cost can only come down when more peole start to use it with greater awareness. Also, With the present emphasis on Nuclear Energy I am sure more transport based on electricity rather than petroleum "osama funding" vehicles is the need of the hour.
