A paper titled “Cost benefit analyst of reducing speed limits in Athens to 30 Km/h” authored by Stella Roussou, Virginia Petraki, Katerina Deliali, Armira Kontaxi, George Yannis has been published in Case Studies on Transport Policy. The study highlights the benefits of lowering speed limits in Athens from 50 km/h to 30 km/h, including a 30-40% reduction in traffic crashes and a 20-25% decrease in injury severity . Additionally, the policy could lower CO2 emissions by 10-15% and improve conditions for pedestrians and cyclists. The overall benefits are projected to outweigh the costs by 3 to 5 times, making it an effective strategy for safer, more sustainable urban mobility.