• ♦Manual Notice2001-1
• ▼1. Traffic Estimation and Forecasting
  • ♦1. Overview
  • ►2. Traffic Data Collection and Reporting
    • ♦Overview
  • ►3. Automatic Traffic Recorder Volume Data
    • ♦ATR Data Collection
    • ♦ATR Data Analysis
    • ♦ATR Data Reporting
  • ►4. Accumulative Count Recorder Traffic Data
    • ♦ACR Data Collection
    • ♦ACR Data Analysis
    • ♦ACR Data Reporting
  • ►5. Highway Performance Monitoring System Traffic Data
    • ♦Overview
    • ♦HPMS Data Collection
    • ♦HPMS Data Analysis
    • ♦HPMS Data Reporting
  • ►6. Five Year Count Program
    • ♦Overview
    • ♦Five Year Count Data Collection
    • ♦Five Year Count Data Analysis
    • ♦Five Year Count Data Reporting
  • ►7. Vehicle Classification Data
    • ♦Vehicle Classification Data Collection
    • ♦Vehicle Classification Data Analysis
    • ♦Vehicle Classification Data Reporting
  • ►8. Truck Weigh-in-Motion Data
    • ♦Weigh-in-Motion Data Collection
    • ♦Weigh-in-Motion Data Analysis
    • ♦Weigh-in-Motion Data Reporting
  • ►9. Vehicle Speed Data
    • ♦Vehicle Speed Data Collection
    • ♦Vehicle Speed Data Analysis
    • ♦Vehicle Speed Data Reporting
  • ►10. Long-Term Pavement Performance Data
    • ♦Overview
    • ♦Long-Term Pavement Performance Data Collection
    • ♦Long-Term Pavement Performance Data Analysis
    • ♦Long-Term Pavement Performance Data Reporting
  • ►11. Border Trend Traffic Data
    • ♦Overview
    • ♦Border Trend Traffic Data Collection
    • ♦Border Trend Traffic Data Reporting
  • ♦12. Traffic Data for Special Projects
  • ►13. Off-System Traffic Data
    • ♦Off-System Traffic Data Collection
    • ♦Off-System Traffic Data Analysis
    • ♦Off-System Traffic Data Reporting
  • ►14. Permanent ATR Locations by District
    • ♦ATR Locations
  • ►15. Vehicle Classification Count Locations
    • ♦Count Locations
  • ►16. Speed Data Collection Sites
    • ♦Speed Collection Sites
  • ►17. Long-Term Pavement Program Site Locations
    • ♦Pavement Program Sites
  • ►18. Texas 6 Vehicle Classification Figures
    • ♦Texas 6 Vehicle Classifications
  • ►19. FHWA Vehicle Classification Figures
    • ♦FHWA Vehicle Classifications
• ►2. Urban Travel Demand Forecasting
  • ►1. Overview
    • ♦Forecasts Guide Planning
  • ►2. Texas Travel Demand Model Package
    • ♦Overview
    • ♦Trip Generation
    • ♦Trip Distribution
    • ♦High Occupancy Vehicle (HOV)
    • ♦Traffic Assignment
  • ►3. Travel Demand Modeling Process
    • ♦Overview
    • ♦Traffic Analysis Zones, Districts, and Sectors
    • ♦Network Development
    • ♦Trip Generation Data Development
    • ♦Trip Distribution Data Development
    • ♦Model Calibration
    • ♦Model Validation
  • ►4. Travel Demand Model Output
    • ♦Overview
  • ►5. Air Quality Conformity Modeling
    • ♦Overview
    • ♦Air Quality Conformity Modeling Process and Programs
  • ►6. Travel Demand Forecasting Organization
    • ♦Responsible Organizations
  • ►7. Travel Demand Modeling Procedures
    • ♦Review and Update
• ►3. Project Level Traffic Data Development
  • ►1. Feasibility Studies
    • ♦Overview
    • ♦Traffic Data Provided
  • ►2. Advanced Planning
    • ♦Overview
    • ♦Traffic Data Provided
  • ►3. Environmental Documentation
    • ♦Overview
    • ♦Traffic Data Provided
  • ►4. Project Design
    • ♦Overview
    • ♦Geometric Design
    • ♦Traffic Data Provided
  • ►5. Pavement Design
    • ♦Overview
    • ♦Traffic Data Provided
  • ►6. Bridge Design
    • ♦Overview
    • ♦Traffic Data Provided
  • ►7. Signalized Intersection Design
    • ♦Overview
    • ♦Traffic Data Provided
  • ►8. Traffic Data for Special Projects
    • ♦Transportation Commission Requests
    • ♦Project Calls
    • ♦Major Investment Studies
    • ♦Traffic Data Provided
  • ►9. Traffic Data and Forecast Request Procedures
    • ♦Requested Information
• ►4. Database Management
  • ►1. Overview
    • ♦Functional Responsibilities
  • ►2. Data File Creation/Maintenance
    • ♦Texas Reference Marker
    • ♦State Railroad File
    • ♦RI File
    • ♦Accident File
    • ♦Highway Performance Monitoring System
    • ♦HPMS Mileage Certification
    • ♦Linear Reference System
  • ►3. Mapping
    • ♦State Base Map Updates - Data Collection

Chapter 1: Traffic Estimation and Forecasting

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Section 1: Overview

Traffic estimation and forecasting involve traffic data collection, traffic estimates, and projections based on historic traffic data, corridor analysis for projects, and urban travel demand modeling. The process involves the Texas Department of Transportation (TxDOT), metropolitan planning organizations (MPOs), and local governments.

Transportation professionals use the results of traffic data collection, estimation, and forecasting to develop transportation plans and programs; analyze project alternatives; complete environmental analyses; prepare roadway geometric, intersection, and pavement design; and select projects.