Overview

• Mainz will reintroduce a 30 km/h speed limit on the Rheinachse and a main downtown artery starting May 20, 2025.
• The move is backed by the city's noise action plan, which demonstrates the speed limit's effectiveness in reducing traffic noise and protecting public health.
• The Rheinland-Pfalz state mobility authority approved the reimplementation after a prior court-mandated removal due to a citizen lawsuit.
• City data indicates that the initial implementation of Tempo 30 halved accident rates and significantly reduced severe injuries.
• The reintroduction reflects broader trends in German cities adopting reduced speed limits to address safety, noise, and environmental concerns.