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Roadway Information and
Traffic Monitoring System Program

Traffic Volume Counts

NJDOT maintains a traffic monitoring program consisting of continuous and short-term elements. The traffic counting program is designed to utilize, at a minimum, 48-hour short-term counts to produce estimates of Annual Average Daily Traffic (AADT). Traffic Counts are taken in all type of public roads statewide at the following locations:

  • 6,000 Short-Term (48-hour) Count sites
  • 90 permanent Weigh-in-Motion (WIM) system sites and
  • 95 Traffic Volume System (TVS) sites
  • 50 Major Station Site
Refer to our New Jersey Traffic Monitoring Program (pdf 1.5m)

To view traffic counts on Live Report webpage:

Short Duration Counts

To compute AADT, the data collected during the short duration counts “48-hour periods” must be adjusted to annual conditions. These adjustments include: axle correction (for counts made with single axle sensors); day-of-week (for counts taken for less than one week); seasonal (to account for changes in volume that occur from one time of year to another); time-of-day (for counts taken for less than 24 hours).

Adjustment Factors by Region:

Region 1
See Map
Traffic in urban Northeastern New Jersey- New York area that serve major industries, warehousing, trucking, logistics and through–truck movements.
Region 2
See Map
Traffic in rural Northwestern section of New Jersey – Pennsylvania – New York area that serve local truck traffic, agricultural, retail and manufacturing with winter season recreational activities and various camping sites during summer.
Region 3
See Map
Traffic in Central and Southern New Jersey that serve pharmaceutical companies, retail, warehousing, agricultural and through–truck movements.
Region 4
See Map
Traffic serving the NJ shore, recreational and beach activities including fishing, boating and Atlantic City casinos. This region experiences high traffic during summer time and on summer weekends only.

Other Helpful Links

Shape file with regions ZIP (28m)

Traffic Count 2010-2013 data set with AADTs that can be imported into a GIS application

Traffic Count 2010-2013 data set with AADTs that can be imported into a GIS application
MS Access Version 2007-2013 ACCDB (2.7m)

MS Access Version 2002-2003 MDB (2.5m)

Database file with regions MS Access Version 2002-2003 MDB (196k)
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  Copyright © State of New Jersey, 2002-2016
  Department of Transportation
  P.O. Box 600
  Trenton, NJ 08625-0600
OPRA - open public records act

  Last Updated:  May 16, 2016