They are car lite. You need to purchase a CoE before you buy a car, those last 10 years, and are auctioned off. Current prices are ~133k sgd for a CoE not including the car which can often be 100k+
My point is that the land use in Singapore truly shows where LTA's priorities are. Look at Tengah or Bidadari, both brand-new neighbourhoods. Huge, wide 6+-lane dual-carriageways with hardly any traffic on them.
My family has a car in Singapore that has about 70000 km on the odometer after about 6 years of driving, which is quite a lot for purely urban driving. The fact is I can get to most of destinations in about half or a third the time it takes on public transport. It is primarily why I drive if I have to get there quicker.