If you are going from Egmore to Central just take a local heading towards the beach and if heading from Central to Egmore take a local going towards Tambaram side........in both the cases you should get down/board up(depending on the situation) @ Park.I am sure you are pretty much aware of it but still i just wanna make your journey as hassle free as possible.So starting from getting a ticket and standing in the queue,waiting for the local and getting to Park from either side should take you around 15 mins. but yeah the actual journey time should be less than 3 mins. or there about,so if you are not in a hurry then go with the local,pretty cheap and cost effective and quick way to get to your destination if you calculate the distance purely on the travel time.Depend on autos as a last resort and if it's a real...
more... emergency but if you got time,go with a local,should cost you 5 bucks. :) Hope that helps.