The encyclopedia · Strategy & Leadership · Operational decision · 1998
Singapore priced every road trip by time and congestion to keep traffic flowing
Singapore replaced paper permits with toll gantries that charge by where, when and how congested the road is.
Land Transport Authority (Singapore)
the move
By the 1990s Singapore's central area was choked, and its 1975 paper-passes could only charge a flat daily fee, so they ignored when and where the congestion actually was.
In 1998 it switched to Electronic Road Pricing: a cordon of gantries plus the expressways, with an in-vehicle unit that reads the charge and deducts it automatically as you drive through.
The charge reflects the time you enter the gantry, and during peaks it can change every half hour, with rates reviewed quarterly and adjusted for school holidays. The point is to keep traffic moving at an optimal speed, not to raise the most revenue.
Drivers respond by rerouting, shifting trips off peak, or taking transit, so the same roads carry more people at a steadier speed rather than piling up at a toll.
why it works
- A charge that rises with congestion makes each driver weigh the delay they add.
- Half-hour, time-of-day rates spread the peak rather than just taxing it.
- Automated gantries and in-vehicle units make the charge cheap and precise to collect.
- Reviewing rates against a target speed turns pricing into a feedback loop instead of a tariff.
what transfers
To price congestion you have to price the moment, not the day.
what came after
Singapore's ERP has kept central-area traffic flowing for decades and is widely cited as the first citywide electronic congestion-pricing system; a satellite-based ERP 2.0 began replacing the physical gantries in the mid-2020s.
references
- Electronic Road Pricing (ERP)
- Opening Speech for Second Reading of the Land Transport and Related Matters Bill
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