This document discusses sustainable transportation initiatives in several European cities. It describes how London implemented a congestion charge to reduce traffic in the city center by 20-30%, and how Stockholm's road pricing system has removed 100,000 vehicles from the central area during rush hours. It also discusses Kaunas, Lithuania's redevelopment of its public transportation system, including investing in electric trolley buses, which has led to a 50% reduction in nitrogen oxide. Overall, the document outlines strategies being taken by various cities to promote more sustainable transportation options and reduce traffic congestion and emissions.