The activity of our lab is concentrated on the spatial behavior of people in the urban environment. We investigate how spatial behaviors, such as movement/mobility, wayfinding and functional-social activities, relate to the characteristics and structure of the urban environment. For that aim, we use spatial, topological and visual analytic tools as well as geographic Information technology for analyzing the morphological and functional aspects of the city (e.g. street network and land use distribution). We also develop agent-based models for simulating and modeling motorized and non-motorized movements in planned or in existing urban environments. Our researches and models are applied in planning of efficient, sustainable and safe urban environment, including the creation and maintenance of livable city centers.