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Non-Motorized Volume Data Program - Phase II Update (May 2019)
Sarah Searcy, ITRE Staff Member
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The Institute for Transportation Research and Education (ITRE) currently manages the North Carolina Non-Motorized Volume Data Program (NC NMVDP) on behalf of the North Carolina Department of Transportation (NCDOT). The purpose of the program is to establish a robust data collection framework to reliably calculate sidewalk, shared use path, bike lane, and shared lane volumes through the installation of permanent bicycle and pedestrian counters that continuously collect count data on representative facilities in North Carolina. ITRE, as an agent of NCDOT, has partnered with local agencies and the technology vendor, Eco-Counter, to install and monitor inductive loop bicycle detectors and passive infrared pedestrian sensors at counting locations in various municipalities across North Carolina.
A primary motivation of the NC NMVDP is to use a system of continuous counters to determine travel patterns by purpose and variability over time to inform the development of daily and seasonal factors. Continuous counting locations are assigned to a factor group based on similar pedestrian or bicycle activity patterns (e.g., commuter vs. recreational) and count data from each group is used to develop expansion factors. These factors are then applied to shorter duration counts collected with portable counters to generate annual volumes. Short duration counts provide geographic coverage, while continuous counts provide the temporal coverage needed to account for day of week and seasonal trends. The NC NMVDP is testing and establishing consistent and replicable data collection and analysis processes that will enable municipalities to count users on facilities at any time of the year and extrapolate reliable estimates of annual pedestrian or bicyclist volumes. The continuous counters further provide valuable and comprehensive user volume data to local agency partners t...
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