It shall be the intent of this zoning district to promote and encourage the development and protect the viability of the downtown commercial area of the city. The regulations which apply within this district are designed to encourage the formation and continuance of a stable, economically healthy and compatible environment for a mixture of commercial, (wholesale and retail), office, government services and residential uses that are located so as to provide the city convenient shopping and service facilities. These regulations are also intended to reduce traffic congestion, provide adequate off-street parking and avoid the development of "strip" type business areas capable of adversely affecting the basic commercial and office character of the district. It is also the intent of this section to limit the extent of the CBD as appearing on the original zoning map of this ordinance.