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Pages 21-26

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From page 21...
... 21 4.1 Overview For project-scale analysis, MOVES accepts inputs of average speed by source (vehicle) type on the project link, where average speed = average travel time/distance (length of link)
From page 22...
... 22 Guide to Truck Activity Data for Emissions Modeling by 6 percent, nitrogen oxide (NOx) by 2 percent, and VOC by 1 percent (Porter et al., 2014c)
From page 23...
... Speeds 23 Source Type Road Type Delta VOC Delta NOx Delta PM2.5 Reduce Truck Speeds by 5 mph in Average Speed Distributiona All 1% 2% 6% Increase Speed Distribution from 90th to 10th Percentile of Statesb All All All 12% 18% 18% Change Speed Distribution from LOS B to LOS Fc Single-Unit Truck Urban Restricted 93% 64–65% 64–66% Combination Truck Urban Restricted 78–84% 27% 70–73% MOVES2014a Default to VA NPMRDS Speed Distributiond Single Unit Urban Unrestricted N/A −18% −28% Short-Haul Truck Urban Restricted 0% 5% Rural Unrestricted 5% 11% Rural Restricted 4% 17% Combination Urban Unrestricted −14% −20% Long-Haul Truck Urban Restricted −4% −7% Rural Unrestricted 0% 16% Rural Restricted −3% 5% aPorter et al., 2014c (using MOVES 2010)
From page 24...
... 24 Guide to Truck Activity Data for Emissions Modeling discrepancy is that compared to defaults, NPMRDS data might be collected mainly on arterial and limited-access roads, where speeds tend to be higher than collector or local streets. However, the extent to which these differences reflect differences between state and national data, differences in data collected in different years, or the inclusion of only National Highway System (NHS)
From page 25...
... Speeds 25 speed data in the NPMRDS are provided to FHWA by Inrix. Truck data are collected from trucks in fleets with GPS data loggers.
From page 26...
... 26 Guide to Truck Activity Data for Emissions Modeling 9. Calculate VHT on each route by dividing the length of the route (miles)

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