Yesterday had travelled from Byappanahalli - Kempegowda on purple line and then from kempegowda interchanged to green line towards nagasandra.Frankly tell you green line is the best in terms of speed even though too many halts are there.where as in purple line from Ulsoor -trinity - MGroad on elevated section it runs on MPS and then from Cubbon park i.e underground up to city Railway station it runs very fast.and the best thing about this metro is from Byappanahalli nagasandra the ticket price is 58 also can go to yeshwanthpur railway station.over all it was good experience for me on green line from kempegowda - nagasandra.