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Pavement & Drainage
Management and Technology

Ride Quality Requirements

The New Jersey Department of Transportation (NJDOT) is implementing a ride quality specification that uses profile data collected with inertial profilers for acceptance testing of the final riding surface. The ride specification is applicable for either hot mix asphalt or Portland cement concrete (PCC) pavements and uses the international roughness index (IRI) computed from profile measurements to quantify the level of ride quality achieved from construction.

Ride Quality Requirements (RQR) Software

To assist designers in developing ride quality requirements for NJDOT projects, below is the link to download Ride Quality Requirements (RQR) software. The RQR is a Microsoft Excel work book containing various macros to automate production of required pay equations and exclusions for ride quality specifications. Make sure macro is enabled when the spreadsheet is opened and the file is saved with an .XSLM extension. For help, send email to Ride Quality Specification Support

Ride Quality Testing

The form for Resident Engineers who would like to request IRI Pavement Rideability testing is located here.

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  Department of Transportation
  P.O. Box 600
  Trenton, NJ 08625-0600
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  Last Updated:  May 7, 2018