Which cities in the world have the best public transit systems?

Hong Kong has the world's best public transit system in terms of distance to public transit, affordability, operating hours, crowding and commute speeds, a new study from the think tank Oliver Wyman Forum said. Hong Kong is followed by Zurich, Stockholm, Singapore, Helsinki, Oslo, Tokyo, Paris, Berlin and London. Delhi's public transit system was ranked 35th worldwide and Mumbai's 41st.