You don't want to wait? Can... Take 851 from Yishun Int to
Marymount Road, then take 74 to Bukit Timah Road and 66/157/174 to
Bukit Batok there. I think 852 only helps (provides alternative) to
ease the crowd of 66, 157, 174, 851 etc...
try taking 74 at night......the bus practically crawls at 20+
km/h along clementi rd,dunearn rd,lornie rd all the way to
hougang.........