Three years after bus rapid transit (BRT) swept through South Africa, Johannesburg's Rea Vaya opened as the first BRT system in Africa, and two years later, Cape Town's MyCiTi became operational. Since then, BRT fever has continued unabated with systems launching in Ekurhuleni, eThekwini, Rustenburg, Tshwane and Nelson Mandela Bay. While the South African BRT systems are modeled after those in Bogota, the process through which South African policymakers learned of and implemented BRT raises questions regarding how and why cities adopt best practice. Essential reading for scholars of geography, politics, sociology and transportation as well as urban planners and practitioners, How Cities Learn describes the process through which cities assemble, mobilize and adopt new policies and practices.