Travel Model Documentation
Travel Model Documentation
The links below provide SACOG’s travel model documentation, updated to reflect the SACSIM19 travel demand model used for the 2020 MTP-SCS.
Please send any questions or comments to sacsim@sacog.org
Overview and Introduction
Table of Contents and Acknowledgements
2.1 Key Concepts and Parameters
2.2 Hardware and Software Requirements
Model Structure
3.1 DAYSIM Person Day Activity-Based Tour Simulation
3.4 Airport Passenger Ground Access Model
3.5 Trip Table Preparation and Assignment
Land Use
4.1 Land Use for SACSIM Introduction
4.3 SACSIM Parcel-Point Structure and Variables
4.5 SACSIM Land Use Spatial Association
4.6 SACSIM Parcel Land Use User Guide Setup
5 Representative Population Data
5.2 Household Population Demographics
5.3 Base Year Household Population Demographics
5.4 Future Year household_population demographics
Networks
6.1 Opening and Editing the Highway Network
7.1 Working with the Transit Network
7.3 Transit Access Coding and Network Additions
7.4 Transit Travel Speeds and Stop Times
8.1 Coding Bike Facilities into the Highway Network
8.2 Building Bike and Walk Skims
8.3 Estimating Bike and Walk Trip Distances
Auto Operating Cost, Fares, and Pricing
9.2 Facility and Mileage Based Pricing
Calibration and Validation
10.2 SACSIM19 Equilibrium Solution Procedure
11.2 Experimental Testing of Key Exogenous Input Factors
11.3 Cross Section Testing of Land Use_Transportation Factors
11.4 Testing of Random Variation in Model
11.5 Facility-Based and Pay-as-You-Go Pricing Testing
12.3 Model Validation and Reasonableness Check
Appendices
Appendix A DAYSIM Reference Guide
Appendix B SACSIM Tolling Enhancments Memo (By RSG)
Appendix C Year 2000 SACOG Household Travel Survey Report
Appendix D Fuel Tax and Mileage Fee Report
Appendix E Caltrans 2019 Validation Memos Prepared by DKS Using SACSIM19 for SR 51 and I-5 Studies
Appendix F Circuity Surface Data Preparation Memo
Appendix H SACOG Travel Behavior Report