sentences: "Halprin and Associates, led by landscape architect Lawrence Halprin, was responsible for "The Look of Market Street" chapter in "What to Do About Market Street"; Halprin took a walk from the waterfront to Van Ness to develop his ideas, and realized "the five Market Streets should have five distinctive characters", making suggestions for each district.At the same time, the City Planning department commissioned the architecture firm led by Mario Ciampi to create the "Downtown Plan", which was published in 1963 and recommended that Market be limited to buses and emergency vehicles; it also called for extending the Central Freeway under Van Ness and the downtown area via a new tunnel.