Lee has more than 30 years of broad experience in traffic operations, traffic design, transportation planning, and transportation research and education. He is recognized internationally for his expertise on roundabouts and other intersection types, and he has guided intersection planning, analysis, design, and research projects throughout the United States and internationally. He has worked extensively on research and design to serve pedestrians of all abilities, particularly people who are blind or have low vision, including serving as co-author and engineering lead on several National Cooperative Highway Research Program projects for roundabouts, channelized turn lanes, and alternative and other intersection types. He served as a founding member of TRB’s Committee on Roundabouts and actively participates on the National Committee on Uniform Traffic Control Devices’ Roundabout Joint Task Force. Lee also served as chair of the Unsignalized Intersections Subcommittee of TRB’s Committee on Highway Capacity and Quality of Service and has taught more than 70 professional short courses on highway capacity, intersections, roundabouts, and signal timing. Outside of work, Lee is an avid pianist and aspiring trombonist and loves capturing landscapes, cityscapes, and wildlife with his cameras.