evidence: Many cities are designed in a car-centric, sprawling way, rather than at people-friendly scales. The 15-minute city is an urban planning concept that intends to change this, with the idea that people should be able to access daily services and essentials within a 15-minute walk or bike ride. [...] The 15-minute city is an intervention that is intended to increase walkability. However, a distinguishing point that is critical to note is that walkability is not the same as accessibility. [...] The 15-minute city idea is a new name for an old concept, but one that nonetheless does lead to improved health, quality of life, stronger communities, local economy improvements, and emissions reductions. There are also a number of challenges in the implementation of a 15-minute city, as well as unintended side effects, in some cases.