research reportCollection of Activity Data From On-Road Heavy-Duty Diesel VehiclesPublication DateMay 1, 2017Associated Project Collection of Activity Data from On-Road Heavy-Duty Diesel VehiclesAreas of Expertise Freight, Logistics, & Supply Chain Travel Behavior, Land Use, & the Built Environment View research reportAbstractN/ARelated Publications policy brief Activity Patterns of Heavy-Duty Vehicles and Their Implications on Energy Use and Emissions