The 15-minute city is an urban planning concept that aims to make daily necessities and services easily accessible within a 15-minute walk, bike ride, or public transit ride from any point in a city. The concept integrates transportation planning, urban design, mixed-use development, safety on streets and sidewalks, with policy making and the real-life experiences of residents to allow for more freedom of mobility and increased opportunity. The idea is to create a polycentric city where density is made pleasant, proximity is vibrant, and social intensity is real. The key element of the model has been described by Carlos Moreno as "chrono-urbanism" or a refocus of interest on time value rather than time cost. The 15-minute city concept is derived from historical ideas about proximity and walkability, such as Clarence Perrys neighborhood unit, and Jane Jacobss model presented in The Death and Life of Great American Cities. The 15-minute city is presented as one possible remedy for car dependency and urban sprawl. The benefits of the 15-minute city include sustainable and healthy living, social inclusion, and reduced greenhouse gas emissions. The 15-minute city is gaining significant attention and has been adopted by mayors and urban planners around the world.