TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 358: Statewide Travel Forecasting Models examines statewide travel forecasting models designed to address planning needs and provide forecasts for statewide transportation, including passenger vehicle and freight movements. The report explores the types and purposes of models being used, integration of state and urban models, data requirements, computer needs, resources (including time, funding, training, and staff), limitations, and overall benefits. The report includes five case studies, two that focus on passenger components, two on freight components, and one on both passenger and freight.

In this research, a feasibility study to develop an Idaho statewide transportation model is conducted. Review of statewide transportation models from Florida, Wyoming, Michigan, Vermont, Indiana, and Pennsylvania is conducted to summarize the most appropriate procedure for developing a statewide model. On the local level, the transportation planning effort in Idaho is reviewed. This effort includes review of the metropolitan planning organization models as well as Idaho commodity flows, which will be the basis for the statewide model. A review of the transportation planning software packages is conducted to select the most appropriate package for statewide modeling. The research team recommends Transplan as the outweighing package for Idaho statewide modeling. A transportation model requires the input of a transportation network, traffic data and land use data. Therefore, the availability of existing digital databases is assessed. This study has constructed the foundation for developing the Idaho statewide travel demand model. On the basis of this feasibility study, ITD will implement phase two of this project, the development of the Idaho Statewide Transportation Model. The proposal for the model is represented in the final section of this report.

Design related project level pavement management - Economic evaluation of alternative pavement design strategies - Reliability / - Pavement design procedures for new construction or reconstruction : Design requirements - Highway pavement structural design - Low-volume road design / - Pavement design procedures for rehabilitation of existing pavements : Rehabilitation concepts - Guides for field data collection - Rehabilitation methods other than overlay - Rehabilitation methods with overlays / - Mechanistic-empirical design procedures.

TRB’s National Cooperative Highway Research Program (NCHRP) Report 716: Travel Demand Forecasting: Parameters and Techniques provides guidelines on travel demand forecasting procedures and their application for helping to solve common transportation problems.

Federal planning legislation and regulations now mandate that state departments of transportation and metropolitan planning organizations consider the needs of freight when planning and programming transportation investments. While there are standard techniques used to forecast the movement of people, less attention has been paid to forecasting freight movements, and there are consequently fewer standardized techniques that state and local agencies can adapt to their local situation. This Toolkit is designed to provide transportation planners with the information they need to prepare forecasts of freight transportation by highlighting techniques successfully developed by state agencies across the country.