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Bid Number: RFLOI 02-PTRM-2023
Bid Title: Request for Letters of Interest: Piedmont Triad Regional Model (PTRM) Update
Category: PART Procurement
Status: Open



The purpose of this project is to update the existing official version of PTRM v5.2 using the latest available data, such as household travel survey, passive data, and traffic counts for transportation planning use of NCDOT and local MPOs. 

The objectives of this project are to:  

  • Update the model input data;
  • Estimate, calibrate, and validate Household Sub-Model and Trip Generation Model;
  • Estimate, calibrate, and validate Trip Distribution Model;
  • Estimate, calibrate, and validate Mode Choice Model;
  • Calibrate and validate Traffic Assignment Model;
  • Update Time-of-Day;
  • Calibrate and validate Tour-based Freight Model;
  • Develop a list of enhancements, such as the area type model and the capacity lookup table, and enhance the model based on the PTRM Model Team’s approval, 
  • Document the model development procedures and provide the user’s guide of the PTRM v6.0; and
  • Provide training of the PTRM v6.0.
Publication Date/Time:
5/15/2023 8:45 AM
Closing Date/Time:
6/19/2023 4:00 PM
Addendum Date/Time:
June 8, 2023 by 5:00 PM
The primary and/or subconsultant firm(s) shall be pre-qualified by the Department to perform ALL of the Discipline Codes listed below for the Piedmont Authority for Regional Transportation. Discipline Codes required are:

140 Travel Demand Model Development

WORK CODES for each primary and/or subconsultant firm(s) (if Subconsultants are allowed under this RFLOI) SHALL be listed on the respective RS-2 FORMS (see section ‘SUBMISSION ORGANIZATION AND INFORMATION REQUIREMENTS’).

All submissions, correspondence, and questions concerning this RFLOI should be directed to Scott Rhine at and Andrew Sowers, at Questions may only be submitted electronically to the contacts above. Responses will be issued in the form of an addendum posted on PART’s website ( and available to all interested parties. Interested parties should also send a request, by email only, to the person listed above on later than 12:00 pm on June 5, 2023. The last addendum is scheduled to be issued on or about 5:00 pm on June 8, 2023.
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