TRAFFIC COUNTS The EUPRP&DC has two types of traffic counters that it uses to collect data: - The Gamma counter is a self-contained, microprocessor-based data collection recorder that works with road tubes to record the axles of detected vehicles. It is designed for simplicity in field operation with corresponding computer software to aid in the translation of the axle data into vehicle information. The recorder collects time tagged data that can be analyzed to provide speed, axle classification, gap, and vehicle information. The Agency has 4 of these types of counters.
- The Nu-Metrics HI-STAR Portable Traffic Analyzer features patented Vehicle Magnetic Imaging technology that can record volume, speed and length classification of vehicles plus road surface temperature, wet/dry surface condition and roadway occupancy. These 2 counters are used mostly on city streets, as they are laid in the middle of the lane and taped down.
Counts are typically 7 day's in length, although some are as short as 48 hours. The raw data is the total of both lanes averaged out. The Annual Average Daily Traffic (AADT) is the raw data multiplied by seasonal factors developed by MDOT and then averaged. 2009 Counts 2007 Counts 2006 Counts 2005 Counts |
