The above is a rough sketch of the Railway System of Bangalore City and not to be confused with the Metro system. The Railway system of the city has its origin with Mark Cubbon who laid the line from Bangalore to Jolarpettai on the Madras Chennai sector.
What we basically understand from the sketch is that Railway lines of the city exit the city through Yelahanka to Doddaballapur and Chikkaballapur....through Yeshwantpur to Tumkur...through Bangalore University to Mysore..through K R Puram to Madras Chennai..and a Salem line that links Salem to the city and passes through places like Marathalli near the old Airport. Note the diagonal links through Hebbal to Yeshwantpur and from Yeshwantpur to Yelahanka. Also note the orientation of the Old and New Bangalore Airports which are along the extended Salem line. Many should note that the New Bangalore Airport is close to Yelahanka.
There is scope to create a Ring Railway around the city if one would venture into such a project which would come handy to transport both Men and Material. From Kengeri to Yeshwantpur to Yelahanka to Whitefeild to Hosur and back to Kengeri. An Airport Station could come between Yelahanka and Whitefeild sector. One of the key advantages of the Ring Railway would be that the people residing in the periphery of the city could reach the Airport through the system.
The Railway lines of the city one should not forget is a stand-by support system which could be developed elegantly to de congest the roads of the city in the future from loads of population wishing to move from one point to the other.