Our Experts Steven Spears Areas of Expertise Safety, Public Health, & Mobility Justice Travel Behavior, Land Use, & the Built Environment Contact Recent Projects SEE MORE Transit, Traffic and Affordable Housing Research Team: Doug Houston (lead), Dongwoo Yang, Steven Spears, Janet Cutler UC Campus(es): Urban Planning and Public Policy Spatially Focused Travel Survey Data Collection & Analysis: Closing Data Gaps for SB 375 Implementation Research Team: Marlon Boarnet (lead), Gavin Ferguson, Steven Spears, Hsin Hsu, Amelia Regan UC Campus(es): Computer Science Policies and Practices Related to Passenger Vehicle Greenhouse Gas Reduction: Evidence and Assessment Research Team: Marlon Boarnet (lead), Hsin Hsu, David Weinreich, Steven Spears Recent Publications SEE MORE Phd Dissertation The Perception-Intention-Adaptation (PIA) model : a theoretical framework for examining the effect of behavioral intention and neighborhood perception on travel behavior