http://citycyclingedinburgh.info/bbpress/ CityCyclingEdinburgh Forum » Topic: 20 mph latest research en Tue, 19 May 2026 00:38:15 +0000 http://citycyclingedinburgh.info/bbpress/topic.php?id=21545#post-375191 Tue, 28 May 2024 20:22:02 +0000 Kim 375191@http://citycyclingedinburgh.info/bbpress/ <p><strong>New paper in the BMJ <a href="https://jech.bmj.com/content/early/2024/04/21/jech-2023-221612">Effect of 20 mph speed limits on traffic injuries in Edinburgh, UK: a natural experiment and modelling study</a></strong></p> <p><strong>Introduction</strong>: There is limited research evaluating 20 mph speed limit interventions, and long-term assessments are seldom conducted either globally or within the UK. This study evaluated the impact of the phased 20 mph speed limit implementation on road traffic collisions and casualties in the City of Edinburgh, UK over approximately 3 years post implementation.</p> <p><strong>Conclusion</strong>: Our results indicate that the introduction of 20 mph limits resulted in a reduction in collisions and casualties 3 years post implementation. However, the effect exceeded expectations from changes in speed alone, possibly due to a wider network effect. </p>