NAtional Vehicle Itinerary GenerATor (NAVIGAT)

In this study, a large-scale passenger vehicle mile travelled (VMT) simulator, called NAtional Vehicle Itinerary GenerATor (NAVIGAT), is developed to simulate household-owned passenger vehicle movements within the whole U.S. at census tract level resolution (including all 50 states and Washington D.C.). NAVIGAT adopts a modeling framework resembling the traditional travel demand models that are often applied in a regional context, combined with a datadriven approach that estimates model parameters using various national-level data sources. Using NAVIGAT, vehicle movements can be tracked throughout the network at the census tract level, and used to track utilization of specific vehicle types or technologies given a technology adoption scenario input, also mapped to the census tract level. NAVIGAT outputs can support the estimation of key transportation and environmental metrics, including location-specific changes in on-road emissions, and subsequent air quality and health impacts on nearby communities. These changes may result from shifts in technology adoption driven by factors such as the deployment of charging infrastructure, adoption incentives, and fluctuations in fuel or vehicle prices.