This document discusses ideas for improving urban planning and city design. It summarizes challenges with the current design of Regent Street in London, including poor air quality, congestion, and an unpleasant environment for pedestrians due to traffic domination. The document then outlines ideas tested in Summer Streets projects that opened Regent Street to pedestrians by reducing car traffic. Evaluations found increased footfall, retailer support, and more people using the area when it was less dominated by vehicles and prioritized for walking. The document advocates designing cities to be more people-friendly and making areas easy for pedestrians and cyclists to encourage more sustainable transportation choices.