In addition to traffic data, other travel behavior data is important for travel demand forecasting. Origin-Destination (O-D) data is one of the most important pieces of information for any model development and planning study, particularly for managed lanes, Interchange Access Requests (IARs), and transit studies. Products from the US Census Bureau, such as Census Transportation Planning Products (CTPP) derived from American Community Survey (ACSs), Longitudinal Employer-Household Dynamics (LEHD) data, and National Household Travel Survey (NHTS) O-D data developed by the Federal Highway Administration (FHWA) offers free and current information at Census Block level or Traffic Analysis Zone (TAZ) level. Regional household travel surveys and transit on-board surveys offer another major source of information.
- Chapters
- 1. Introduction and Overview
- 2. Traffic Data Sources and Factors
- 3. Scoping for Project Traffic Foresting
-
4. Forecasting with Travel Demand Models
- 4.1 Introduction
- 4.2 Corridor and Project Traffic Forecasting
- 4.3 Fundamentals of Travel Demand Models
- 4.4 Model Calibration and Validation
- 4.5 Model Assessment and Selection
- 4.6 Travel Demand Model Development and Application
- 4.7 Use of Model Outputs in Traffic Forecasting
- 4.8 Documentation of Traffic Forecast
- 5. Forecasting Without a Travel Demand Model
- 6. Directional Design Hour Volumes
- 7. Estimating Intersection Turning Movements
- 8. Equivalent Single Axle Load (ESAL) Forecasting
- 9. Project Traffic for Tolled Managed Lanes
- Appendix A
- Appendix B
- Appendix C
- Appendix D