Official Site of The State of New Jersey

Public roadway mileage figures are maintained by NJDOT through road inventories. A public road is any road or street owned and maintained by a public authority and open to public travel. New Jersey has approximately 39,000 miles of public roadways. New Jersey's official estimate of vehicle miles traveled (VMT) is a product of the Highway Performance Monitoring System (HPMS) Program. VMT is a measurement of the amount of traffic on a given mile of roadway. Deriving New Jersey's VMT estimate involves multiplying the traffic volume on each HPMS section, the section length and expansion factor then summing the product to yield VMT for any desired aggregation level.

For further information, you may call the NJDOT Bureau of Transportation Data and Support at 609.963.1880.

You will need Adobe Acrobat Reader to view the PDF files, which is available free from our state Adobe access page.

• New Jersey's Public Roadway Mileage & VMT Estimates:
  From 1998 thru 2023 (22k)
• New Jersey's Historical Daily VMT by Area Type (43k)
• 2017 National Highway System Route List (488k)
• 2008 National Highway System Route List (102k)