Enterprise Flasher Company

Your Traffic Safety Is Our Business

Groundhog® G-8



The Groundhog G-8 is a wireless, permanent traffic analyzer that collects data without any external sensors, loops, or tubes. The Groundhog is a self-contained, in-pavement sensor that utilizes Vehicle Magnetic Imaging (VMI) technology to detect vehicle count, speed and classification.

The Groundhog reports wirelessly to a site controller alongside the roadway, or to a road weather station (RWIS). The sensor features an easily removable lid, which allows for quick extraction of sensor components during road maintenance or sensor maintenance.

The Groundhog provides accurate and essential data necessary for effective traffic analysis, control and management. When used with Nu-Metrics® Wireless Data Management (WDM) software, historical data can easily be presented in the form of reports, charts, and graphs.


  • Permanent solution for detecting vehicle count, speed and classification
  • Easy to use WDM software
  • Lower maintenance costs than traditional inductive loops


  • Highways and city streets with free-flow conditions
  • Parking lots, garages, and shopping centers with free-flow conditions
  • Toll booths
  • Construction areas
  • Airports, stadiums, and casinos
  • Military bases and border crossings
  • Integration with incident management systems, such as low visibility warnings, vehicle-in-median warnings, and variable message sign notifications
  • Compatible with QTT Road Weather Information Systems (RWIS) and IntelliZone AdvanceWarn® systems


  • Provides accurate vehicle counts, speed, and classification
  • Monitors traffic at specific locations
  • Wireless data transfer
  • Easy to use software for viewing data
  • Removable lid allows for equipment to be retrieved before road repaving operations
  • Provides useful data for planning expansion/growth of roadways
  • Compatible with QTT road weather stations

Key Specifications

Model G-8CS
Canister Dimensions 6 inches (diameter) x 3.25 inches (height) (152.4 millimeters x 82.6 millimeters)
Operating Temperature -40°F to +185°F (-40°C to +85°C)
Electrical Operating Voltage 3 volts
Battery Type Lithium thionyl chloride
Battery Life Up to 3 years (typically 1 to 3 years, varying with AADT* and polling interval)
Transmitter Frequency Frequency hopping: ISM 902 - 928 MHz or ISM 2.4000 - 2.4835 GHz
Distance from Groundhog to LBU 425 feet (129.5 meters) maximum; 200 feet (61 meters) recommended
Vehicle Count Binned; speed, length, daily and AADT
Vehicle Speed Binned; custom up to 12 bi
Vehicle Length Binned; custom up to 6 bins
Polling Intervals 5 to 120 minutes
CE Compliant CE Conformity: Electromagnetic Compatibility Directive EN-61326-1:2006
Section 6 - Immunity Requirements,Table 2
Section 7 - Emissions Requirements, Class A limit

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