regional drivers. TxDOT truck data from throughout the state was compared against the volume of trucks in the ATRI data for the same period to estimate the percentage of trucks captured by the sample in various parts of the state. The resulting percentages were used to develop expansion factors. The study concluded that truck parking demand is typically highest overnight, and facilities often are at or over capacity during these hours. The time period with the greatest demand for truck parking, also known as the peak hour, was determined using truck GPS data. The statewide average peak hour for truck parking is from 1:00 a.m. to 2:00 a.m., although individual locations may have a different peak hour. Some other states have used FHWA’s Truck Parking Demand Estimation Tool to estimate the peak number of trucks requiring parking based on employment and industry data. A recent Truck Parking Study completed by the Connecticut Department of Transportation (CTDOT) utilized the FHWA methodology to estimate current (2019) and future (2040) perk hourly short-term and overnight parking demand along state routes with high truck use. 5 The calculated demand is a function of local data on traffic volumes, speeds and percentages of short- and long-haul, and FHWA default parameters for hours-of-service and peaking factors. The corridor level parking demand estimates were adjusted accordingly based on ATRI data and the truck parking supply inventory data.
5 Connecticut Truck Parking Study, CTDOT. https:/ www.transportation.gov/sites/dot.gov/files/2023 -12/Truck-Parking-Study.pdf
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