Answer30 - The North -South length of the islandBombay is more. The Central Railway passes through the place of Brahma of Bombay city. Therefore the Railway board gets less profit from the Central Railway and even it is not developed to the extent. The Western Railway has passed through the Western part of Bombay. The West is the direction of air therefore fast moving vehicles have progressed in the Western direction. As more sea is on the West of Bombay the western suburbans have also progressed more than the Eastern suburbans.