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Roadway Information and
Traffic Monitoring System Program

Vehicle Classification

Vehicle Classification Counts are collected at our permanent Weigh-in-Motion (WIM) Sites. NJDOT classify vehicles based on modified FHWA vehicle classification scheme. Automatic vehicle classifiers need an algorithm to interpret axle spacing information to correctly classify vehicles into these categories. The algorithm we use is based on axle spacing and weight combination for specific vehicle types.

Vehicle Classification Scheme Descriptions

13 Vehicle Classification Scheme Graphic (pdf 119k)

NJDOT type Vehicle Classification Algorithm
   NJDOT-Class Scheme by Axle Spacing (pdf 25k)
   NJDOT-Class Scheme by Axle Weight (pdf 25k)

Vehicle Classification reports at WIM Sites
   2013 Weekday (pdf 5m)
   2013 Weekend (pdf 5.4m)
   2013 Combined (pdf 5.9m)

Annual Summary of Travel Activity by Vehicle Type
- 2012 Statewide and Regional Average Travel Summary by Roadway Functional Class (pdf 17k)

Vehicle Classification Reports 2000-2011  

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  Department of Transportation
  P.O. Box 600
  Trenton, NJ 08625-0600
OPRA - open public records act

  Last Updated:  June 9, 2014