Daily Vehicle Miles Traveled (DVMT)
Daily Vehicle Miles Traveled (DVMT) is a simple mechanism to measure how much traffic is flowing along a roadway during an average 24 hour period. This simple formula multiplies Average Annual Daily Traffic (AADT) by the length of the roadway. For example; if a roadway was 2 miles in length and the AADT was 4000 vehicles per day the DVMT would be computed by multiplying 2*4,000 =8,000 or 8,000 DVMT.
County-By-County DVMT is computed using the State of Ohio, Department of Transportation’s Roadway Information Files and the annual Highway Performance Monitoring System (HPMS) Summary Reports. DVMT’s are computed for all of the Federal Functional Class(FC) categories (see list at the end of this readme file) within each of Ohio’s 88 counties.
The AADT and Roadway length information are very accurate for The State Highway System (Interstate, US and State Routes, ). For roadways that are not part of the State Highway System, various representative counts were used, such as: railroad crossing counts, HPMS Sample Section Counts etc. All traffic count data that was not collected during the current year has had a statewide growth factor applied that accounts for systematic growth.
Given the previously mentioned methodologies, the DVMT data is more accurate on roads functionally classified as collector or above.
All DVMT figures in this report are in thousands. In the heading of the reports this is referred to as kDVMT, or Daily Vehicles Miles Traveled in thousands, where the k=1000. For example; if the report lists the DVMT at 26.52, the actual value would be computed a 26.52*1,000=26,520.