This project assesses the extent of the relationship between mixed-use zone comprehensiveness (as gleaned from municipal land use ordinances) and measures of walkability. The primary hypothesis is, controlling for city population size and SES, the higher mixed-use zone comprehensiveness (i.e. adherence to the American Planning Association’s model mixed-use zone), the higher its walkability. The unit of analysis is approximately 180 Mixed Land Use Zones in 25 California cities (with populations of 50,000 or above).