Singapore is hosting the 2012 Formula 1 Singtel Singapore Grand Prix from 21 to 23 September 2012.
You can refer to LTA's website or read the Road Access & Public Transport Guide (.pdf) for the series of road closures planned from 19 to 25 September.
SMRT has added about 330 train trips on its MRT lines and extended train and bus service timings from Sept 21 to 23, 2012.
The last north, east and west-bound trains from City Hall will leave the station at 1.11am on Saturday, Sunday and Monday.
Read more (SMRT increases train and bus trips for Singapore Grand Prix 2012)
Commuters affected by F1 road closures