Request for Letters of Interest - Model Update

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Request for Letters of Interest - Model Update


The Piedmont Authority for Regional Transportation has released the attached Request for Letters of Interest. Letters of interest are due electronically no later than 4:00 pm on June 19, 2023.


The purpose of this project is to update the existing official version of the Piedmont Triad Regional Model (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.


The deadline for questions is June 5, 2023, by 12:00 PM EST.


Thank you for your consideration,