Helsinki has achieved zero traffic deaths for a full year, with more than half of its streets having speed limits of 30 km/h. The city's approach to reducing traffic deaths involves cooperation between city officials and police, as well as increased automated speed enforcement. The reduction in speed limits has led to a debate about the impact on quality of life and travel times. The city's efforts have been successful in reducing traffic fatalities, but some argue that it comes at the cost of slower travel times.