Nairobi Expressway couldn't have come at a better time for long-suffering city motorists

Motorists drive on the newly opened JKIA-Westlands Expressway on May 14, 2022. [Wilberforce Okwiri, Standard]

Cities have a crucial role to play in the attainment of Sustainable Development Goals (SDGs). Over 50 per cent of the global population lives in cities, which are also responsible for around 70 per cent of global energy-related emissions.

As cities grow, demand for urban transport also increases. But how these cities respond to the growing demand will determine the impact on the environment.