Singapore's extensive bus service is clean, efficient and regular, reaching every corner of the island. The two main operators are SBS Transit and SMRT. Both offer similar services. For information and routes, check the websites. Alternatively download the 'SG Buses' smartphone app, which will give you real-time bus arrivals.
Bus fares range from S$1 to S$2.10 (less with an EZ-Link card). When you board the bus, drop the exact money into the fare box (no change is given), or tap your EZ-Link card or Singapore Tourist Pass on the reader as you board, then again when you get off.
Train operator SMRT also runs late-night bus services between the city and various suburbs from 11.30pm to 4.35am on Fridays, Saturdays and the eve of public holidays. The flat rate per journey is S$4.50. See the website for route details.