research report Collection of Activity Data From On-Road Heavy-Duty Diesel Vehicles Publication Date May 1, 2017 Associated Project Collection of Activity Data from On-Road Heavy-Duty Diesel Vehicles Areas of Expertise Freight, Logistics, & Supply Chain Travel Behavior, Land Use, & the Built Environment View research report Abstract N/A Related Publications policy brief Activity Patterns of Heavy-Duty Vehicles and Their Implications on Energy Use and Emissions