Implementation of Singapore’s congestion pricing system began in 1975 and became a prominent example of managing traffic by charging for road use rather than simply prohibiting it. The system evolved from a rush-hour toll for entering the central business district into a more finely timed, electronically enforced arrangement. Its central principle was to make the cost of driving visible and leave the choice to individual drivers, trusting the aggregate of those choices to help control congestion.

Origins and Expansion

Singapore introduced congestion pricing in 1975, when drivers had to pay a toll to enter the central business district during rush hour. The arrangement resembled London’s later congestion-charge scheme, but Singapore gradually widened its scope: the charge eventually applied to entry into the district throughout the day, not just at peak commuting times.

The policy’s development reflected a broader contrast with places where charging for road use was politically difficult. The book notes that Americans readily accepted demand-based prices in other settings, such as higher daytime long-distance-call rates or cheaper drinks during happy hour, yet often preferred driving to carry no monetary price. Singapore, described as culturally unlike the United States and less constrained by angry drivers’ groups or disgruntled voters, was able to make congestion pricing a sustained public policy.

From Manual Enforcement to Electronic Charging

At first, meter maids enforced the rules by recording the license plates of drivers who violated them. The system later shifted to electronic smart cards attached to every car’s dashboard. When a car crossed into a paid zone, the charge was deducted from the card.

This technology served two purposes. It made evasion impossible, according to the account, and made the financial consequence of driving immediate and apparent to the driver. Rather than leaving the toll as an abstract policy or a penalty encountered later, the system connected the decision to enter a zone with its cost at the moment of travel.

Variable Prices and Individual Choice

Singapore also refined the schedule of charges. A single morning rush-hour price gave way to “peak-within-peak” pricing: driving between 7:30 and 8:00 a.m. cost half as much as driving between 8:00 and 9:00 a.m. The system also included evening pricing. Weekend-only cars received tax breaks and price rebates, adding another way to differentiate vehicle use by time and circumstance.

The arrangement did not assign particular days on which individuals were forbidden to drive. Mexico City’s license-plate restrictions provide the book’s contrast: drivers whose plates ended in 5 or 6 could not drive on Mondays, with other plate numbers assigned other weekdays. The restriction did little to reduce traffic because drivers had no reason to seek alternatives on the days they were permitted to drive, and some bought second cars to get around their assigned days. Singapore instead stated the price and left drivers to decide whether driving was worth it.

Results and Policy Trade-offs

The book reports that traffic in Singapore was much better than in London or New York, even though Singapore had more cars per mile of road than any Western country. It cautions that Singapore is a very small country, so the comparison does not isolate the effect of pricing alone. Still, the example supports the argument that the policy can coordinate many separate decisions without centrally forbidding each one.

The system also raises a question of fairness. Wealthier drivers can more readily exchange money for time and convenience, while poorer drivers may avoid a toll by not driving without being better off. The account therefore argues that a fair congestion-pricing plan must address the use of its revenues as well as the tolls themselves. Singapore did so by building a modern mass rapid transit system. Its pricing system thus combined a charge intended to shape individual choices with public investment in an alternative to driving.