Also available in: Español Photo: Andy Shuai Liu/World Bank Invented over a century ago for exploring mountainous regions, aerial cable cars have recently made an appearance in several big cities…

Leonardo Canon Rubiano, Wenyu Jia, Georges Darido |

Follow the authors on Twitter: @chyiyunhuang and @shomik_raj   A recent trip to Addis Ababa really brought the imperatives of transit-oriented development as a complement to mass transit…

Chyi-Yun Huang, Shomik Mehndiratta |