Illustrated comparison inspired by the place and case. Conceptual scenes, not a photographic before and after.
How the change works
- 01 / Public decision
Toll with accessible alternatives
- 02 / Physical change
Change the traffic in the affected area
- 03 / Possible outcome
Less pollution over the period studied
Charging for access during congested hours can reduce the number of vehicles and exposure to pollutants.
Research and local documents ↓What the evidence tells us
A quasi-experimental study on the Stockholm toll estimates a reduction in pollution of 5— 15% and fewer acute asthma attacks in young children.
Conditions and limits
The result concerns that system and that period. We need affordable alternatives and an assessment of who bears the cost.
Other possible benefits
Fewer acute asthma attacks in young children in the study.
Research and local documents
- Evidence for this findingSimeonova et al. · J. Human Resources, 2021; NBER 24410 ↗
A quasi-experimental study on the Stockholm toll estimates a reduction in pollution of 5— 15% and fewer acute asthma attacks in young children.
- Local project or policy documentTransportstyrelsen · Congestion taxes ↗
Documentation from the Swedish authority on the operation of the system, separate from the scientific assessment.
- Scientific basis of the mechanismIPCC AR6 WGIII · Chapter 10: Transport, 2022 ↗
Scientific synthesis of the mechanism: active mobility, collective transport, efficiency and energy mix. It is not a causal assessment of the individual local project.
