But urban planners looking for solutions to gridlock may find the draconian measures hard to replicate in other less- compliant cities.
Singapore has gone further than any other major city to avoid the monster jams that have blighted Asian metropolises such as Jakarta or Manila.
The tough approach has been possible as Singaporeans are used to strict control -- with media closely monitored and harsh punishments for minor crimes -- and are fearful the city-state will be flooded with vehicles without the curbs.
"I think the system can be made better and fairer," Joel Lee, a 28-year-old technician, told AFP.
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He said authorities should make "a distinction between those who need cars, be it for work or family commitments, and those who just want more cars as a status symbol".
Authorities' main tool is the certificate of entitlement, or COE. Every potential car buyer must bid for a certificate and the cost is added to the vehicle price.
But COEs fluctuate depending on demand and at their high point four years ago the same car was Sg$159,000 (US$127,000 at the exchange rate at the time) -- six times the price in the US.
The certificates are valid for 10 years, after which the car must be scrapped or the certificate renewed.
Despite the high price, many in the financial centre, home to hordes of wealthy expats and millionaires, have bought cars, with some 600,000 on the streets -- a considerable number for a limited road network.
Authorities last month decided to freeze the number of private cars on the road from February for at least two years, citing land scarcity.
But the decision sparked anger and was followed by a jump in the price of COEs by several thousand dollars, in what the Straits Times newspaper described as "panic buying".
To mitigate its tough policies, Singapore has built a modern public transport network with a subway, overland trains and buses, and the government recently announced a plan to spend Sg$28 billion to upgrade the system.