Shengxiao (Alex) Li is a Postdoctoral Researcher at the School of Public Policy at University of California Riverside. He received his PhD in City and Regional Planning at Penn. Prior joining Penn, he obtained his bachelor’s degrees in urban management and economics and his master’s degree in city and regional planning from Peking University in China. His research focuses on two areas: (1) the relationship of transport and land use at the regional and neighborhood levels internationally, and (2) the travel behavior of vulnerable people and policy interventions to promote transport equity. His current project at Penn mainly focuses on the residential location, travel behavior, and wellbeing of older adults in the United States. He aims to bridge several research fields with respect to aging mobility in urban planning, geography, public health, social work, and gerontology and derive planning implications in an aging era. He has published more than ten papers in top-tier transportation planning journals, including Transportation Research Part A and Part D, Journal of Transport Geography, Transport Policy, and Transportation. He was awarded competitive thesis scholarships twice from Peking University-Lincoln Institute, in 2014 and 2017.