Sustainability Language

Strategy, Targets & Performance Management

Congestion charging

A fee charged to vehicles entering or driving within a defined urban zone, intended to reduce traffic, emissions and congestion at peak times.

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Definition

Congestion charging is a demand-management instrument under which motorists pay a fee to drive within a designated area, typically a city centre, usually during busy periods. By putting a price on scarce road space it aims to cut vehicle volumes, improve travel speeds and air quality, and encourage modal shift to public transport, cycling and walking.

References

Overview

What it means

A market-based way of rationing road space: drivers who value the trip most pay, while discretionary trips shift to other modes or times.

How it is used

Singapore introduced the first scheme in 1975; London followed in 2003 and Stockholm made its congestion tax permanent in 2007 after a trial, cutting traffic around 15 per cent and reducing CO2 emissions in the zone. Revenue is frequently earmarked for public transport investment.

Why it matters

Congestion charging is one of the few transport policies with well-documented, measurable reductions in urban traffic, local air pollution and greenhouse gas emissions, making it a reference case for pricing instruments in sustainability policy.

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