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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

Vehicle Classification reports at WIM Sites

2011-2013 Truck (Class 9) AADT at WIM sites (pdf 560k)

Annual Summary of Travel Activity by Vehicle Type

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:  May 26, 2015