Eliminating zoning cannot solve the problems of restrictive land uses and social segregation, as is demonstrated by the experiences of cities that do not rely on zoning. In the absence of zoning, cities still tend to be shaped by land-use rules in some form, but these rules may be driven by private-sector demand, giving higher-income areas more land-use protections, while leaving low-income areas with few development standards. For example, the city of Houston in Texas is well known for being the only major city in the United States without a zoning ordinance.