Mylapore is one place where all forms of Transport are accessible. Train, Bus .. even Boat/Shop is viable as the shore is near.
Mylapore Railway station also has escalator. If you want to use the Escalator don't take the entry in front of the station instead take the route on left of the station - you can ask for Rail Bhavan behind the Station from where you can take the escalator to the top. There are also couple of pay and use toilets ... not so bad near the Reservation counter
This could easily become a railway station like a London tube if the NRI and IT Ambis around this area think on developing this.