Aims to provide essential services within 15 minutes of any city location. Promotes walkability, cycling, and public transit access. Builds upon pre-modern urban planning traditions. Requires multi-disciplinary approach involving transportation and design
Highway is any public or private road with right of access. Term predates 12th century according to Merriam-Webster. In US, highway means controlled-access road or motorway
Speed bumps use vertical deflection to slow vehicle traffic. Speed humps have traverse distance of 3-4.3m, typically 8-10cm high. Speed cushions are multiple small bumps with spaces between them. Speed tables are long humps with flat sections for passenger cars
Street is a public thoroughfare in urban environments for people to move freely. Word "street" comes from Latin "strata" meaning paved road. Streets have roots in ancient roads and trade routes
Traffic congestion is characterized by slower speeds and longer trip times. Urban road congestion has increased significantly since 1950s. Main causes include bad weather (15%), poor signal timing (5%), and special events (5%). Separation of work and residential areas causes frequent commuting
Over 50% of world's population lives in cities. Greenness exists on spectrum, no single "greenest" city. Factors include green spaces, transportation, bikeability, and renewable energy