This project examines the land use-transportation interaction from an evolutionary perspectiveÑOnce a certain set of goals are determined and pursued by politicians and planners, their land supply and transportation investment decisions are to a large extent driven by their previous decisions and the supply-demand dynamics in the urban system. Built upon this recognition of historical dependency and a transportation network growth model previously developed by the P.I., a model of the co-evolution of land use and transportation is proposed in this project. Different from existing integrated land use and transportation models that assume exogenous network investment decisions, the co-evolution model considers both land use growth and transportation network growth as endogenous and market-driven. The central research question is how market and policies translate into transportation facilities and land use developments on the ground.