The original purpose of Project 0-6395-TI was to assess the usefulness and viability of the
Joint Analysis Using Combined Knowledge (JACK) model as a planning and forecasting
tool. What originally was named the JACK model was substantially revised, expanded and
renamed the Texas Revenue Estimator and Needs Determination System (TRENDS) model.
The TRENDS model is designed to provide transportation planners, policy makers and the
public with a tool to forecast revenues and expenses for the Texas Department of …

" The TRENDS model provides transportation planners, policy makers, and the public a tool
to forecast revenues and expenses for the Texas Department of Transportation for the period
2010 through 2035 based on a user-defined level of transportation investment. The user,
through interactive windows, can control a number of variables related to assumptions
regarding statewide transportation needs, population growth rates, fuel efficiency, federal
reimbursement rates, inflation rates, taxes, fees, and other elements. The output is a set of …