This post originally appeared on National Geographic's "City Solutions" blog.
City leaders face incredible pressure to deliver sustainable transportation. Cities now account for more than half of the world’s population—by 2050, they will hold 75 percent of us. These people--increasingly from the middle class--will need ways to commute to work, travel, and carry out their livelihoods.
At the same time, 1.27 million people die from traffic accidents every year—about half of these fatalities occur in cities. Cities also account for about 70 percent of global greenhouse gas emissions, much of which is transportation-related.
Cities, then, are tasked with a huge challenge: provide reliable, safe, and affordable transportation systems that can benefit both people and planet.
Meeting this challenge is a topic we discussed at length during the 10th annual Transforming Transportation conference in Washington, D.C. The two-day event looked at the various ways to scale up sustainable transportation and share lessons learned. Examples of city leadership were featured prominently throughout the event—and can serve as inspiration for how urban centers can meet transportation challenges.