P lan - Required by the TPR, this is the city's master plan for its transportation system. It includes plans for each mode of transportation, bike, pedestrian, motor vehicle, freight, transit, a financing plan, and a 20-year project list. T raveled - A measure of vehicle use. Volume Traffic volume - The number of vehicles counted passing a single point. Traffic volume is typically measured relative to a time period of 15 minutes, one hour, or 24 hours.
All vehicles contribute some emissions, whether through their use, manufacture or disposal.