For over 10 years, Alliance has been assisting TxDOT by developing, updating, and enhancing the Texas Statewide Travel Demand Model. The Statewide Analysis Model (SAM) provides travel forecasts at a level of detail suitable for use in comparative analyses of large scale transportation corridor projects and other large scale investments. The model can also be used to perform analyses of the transportation outcomes and economic impacts of state level transportation, land use, and economic policy decisions and strategies.
The Alliance team of expert modelers designed SAM to incorporate AMTRAK ridership, FAA ridership, and urban transit information, as well as the drive alone and share ride component estimate based on the NHTS. The multimodal model is state-of-the-practice, providing highway traffic forecasts for both highway passenger travel and freight transport, intercity and high speed passenger rail ridership, freight rail tonnage and train forecasts, and forecasts of air passenger travel to and from Texas airports.
As the Alliance team updates and enhances the model, we are able to add a number of features designed to provide analysis that leads to transportation solutions, including:
- Enhanced usability
- Enhanced multimodal passenger analysis capabilities
- Estimated roadway capacities based upon the Highway Capacity Manual
- Incorporation of intersection delay
- Trip assignment by time of day
- Feedback of congested travel time from assignment to distribution
- More detail in the commodity based freight models
- Increased flexibility and expandability
- Additional reporting capability
The Alliance team is excited to continue to work with TxDOT on this very important statewide travel demand model, designed to analyze the possibilities and create solutions.