Aaron has a wide range of transportation experience, with particular expertise in traffic operations, multimodal level of service, and safety work. His traffic operations experience includes a number of ramp metering projects throughout California as well as the performance of freeway volume calculations. Aaron has worked on a wide range of large-scale traffic studies for environmental impact reviews in California and has been involved in numerous safety studies looking at both vehicle safety and pedestrian safety in California. Aaron is an expert on the application of the urban street facilities chapter of the Highway Capacity Manual (HCM), which provides a methodology for determining multimodal level of service. As part of this expertise, Aaron serves on the Highway Capacity Subcommittee that oversees the pedestrian and bicycle chapters of the HCM.