City planners have been reimagining urban transportation since Baron Haussmann transformed Paris with his grand boulevards and London pioneered the first underground railway in the 19th century. Today, cities stand on the threshold of another new transformation: With evidence growing about the threat of climate change and transportation generating 15% of global greenhouse gas emissions, it’s clear that the future of mobility depends upon sustainability.

The Oliver Wyman Forum’s latest annual Urban Mobility Readiness Index includes a sustainable mobility sub-index for the first time, and the results are striking. Eight of the top 10 cities in overall mobility also rank in the top 10 for sustainability. The pacesetters include Oslo, Amsterdam, and Hong Kong. Please see the results of our analysis below.