streets create environments with reduced air temperatures, generating more comfort. Complete streets Complete streets are accessible, accommodating, and safe for pedestrians and cyclists. By implementing urban development strategies, active travel, community engagement, and safe access are promoted to develop a street for all users. They are intended to provide social equity for all users. Low-income neighborhoods are most vulnerable to Incomplete streets. Incomplete streets adversely affect the surrounding communities as the conditions can be unsafe and create more significant risks for pedestrians. Incomplete streets have a higher potential for accidents or injury, and effects relating to air pollution can also influence pedestrians. incomplete streets create challenging conditions for pedestrians to walk or bicycle. Incomplete streets create car-dependent barriers and are designed only with cars in mind. Complete Streets provide drivers and other pedestrians opportunities to alter their means of transportation. The reduction of vehicular traffic increases walkability as well as bicycle safety. Complete streets provide the highest priority to walking and sustainable transportation. Complete streets assess factors such as trip duration, path gradation, and typical weather conditions are assessed to see if active travel is possible. Each design of a Complete Street includes various elements. Design strategies in complete streets include lane reductions/width reductions - decreasing the right-of-way of vehicles giving the street back to pedestrians, and creating opportunities for bicycle lanes. Raised crosswalks - a traffic calming device that brings motor traffic to the level pedestrians walk at. Curb extensions and medians increase space for street amenities such as plants, benches, and trees. Strategies implemented within complete streets improve overall health and strengthen urban ecosystems. Complete streets create environments enticing pedestrians to walk or bike. The spaces created in a complete street also encourage social interactions and productive areas. Cities are actively designing streets to prioritize pedestrian traffic efficiently and safely, create streets that reduce air pollution, and absorb storm runoff. (40) Developing complete streets also considers future technology. Future development of autonomous vehicles will reduce parking demand. History Progress in the United States Since the late 19th century American planners have faced problems concerning traffic congestion and street safety. The two typical designs of American neighborhoods were the gridiron plan and curvilinear street, but safety concerns regarding motor vehicles brought new street patterns in the 1920s, one being the "neighborhood unit." The Radburn plan developed by Henry Wright and Clarence Stein in the late 1920s as well as