People are weighing various options….besides- share autos, individual vehicles and scheduled vans, there are Metropolitan buses and …. Parakkum rail (not the full path though !) ~ it is Chennai Mass Rapid Transit System, a state-owned subsidiary of Indian Railways, unique elevated railway line in India. The line runs for a distance of 19.34 km (12.02 mi) with 17 stations, from Beach to Velachery…… with plans to get extended to St Thomas Mount thereby getting linked to the existing Beach Tambaram EMU line. The alignment from Chennai Beach to Park Town is along the existing broad-gauge suburban system (2.75 km (1.71 mi), surface); alignment from Park Town to Thirumayilai is along the Buckingham canal (6.21 km (3.86 mi), elevated) ~ further till Velacherry is also on elevated line.
The Mass Rapid Transit system (Parakkum rail) is not exactly overcrowded. It has the following Stations (read the distance in Km within bracket from origin)…. Chennai Beach; Fort (1.7); Parktown (2.54); Chintadripet (3.43); Chepauk (5); Thiruvallikkeni (5.74); Lighthouse (6,95); yet to be opened Mudakagkani amman temple (7.925); Thirumayilai (8.66); Mandaveli (9.69); Greenways Road (11.02); Kotturpuram(11.892); Kasturba Nagar (12.824); Indira Nagar (13.796); Thiruvanmiyur (14.655); Taramani (16.57); Perungudi (17.713) and Velachery (19.34)
The train takes around 40 minutes to reach Velacherry from Beach… 30 minutes to reach Thiruvanmiyur… from Triplicane to Thiruvanmiyur, it is approx 16 minutes………….. though one cannot compare it with Delhi Metro either for the AC / tidy looks / maintenance or digital announcement s – the trains do have boards announcing the movement / destination etc., (not in all trains says my friend). Here are the train timings from Triplicane towards Velacherry as found in the Triplicane station. The fare from Triplicane to Velacherry is Rs.5/- only (one way). On Sundays, trains run in lesser frequency.. 
With regards – S. Sampathkumar.
