Trip-Based Model
Existing Travel Demand Model
The Regional Travel Demand Model provides travel forecasting capabilities for the analysis of SCAG’s plans and programs. The trip-based model was Peer Reviewed in May 2011 and found consistent with the state-of-the-practice.
Activity Based Model
The Activity-Based Model (ABM) is a new generation of travel demand model. The AMB simulates daily activities and travel patterns of all individuals in the region, as affected by transportation system level of service. This new modeling system is designed to meet or exceed federal regulations and state laws/requirements.
- Modeling Task Force Presentation: SCAG Activity-Based Model Development Workshop Presentation
- SimAGENT Final Report 1 - Overview
- SimAGENT Final Report 2 - Opportunity-Based Dynamic Accessibility Indicators in SimAGENT
- SimAGENT Final Report 3 - Population Synthesis
- SimAGENT Final Report 4 - Activity-Based Travel Demand Analysis
- SimAGENT Final Report 5 - TRANSIMS and MATSIM Experiments in SimAGENT
- A Joint Vehicle Holdings (Type and Vintage) and Primary Driver Assignment Model with an Application for California
- A Methodology to Match Distributions of Both Household and Person Attributes in the Generation of Synthetic Populations
- A Household-Level Activity Pattern Generation Model for the SimAGENT System in Southern California
- Simulator of Activities, Greenhouse Emissions, Networks, and Travel (SimAGENT) in Southern California
- The Application of a Socio-Economic Model System for Activity-Based Modeling: Experience from Southern California
- SCAG DTA Model Development & Training
- Read more
Subregional Modeling
The new Subregional Modeling Tool (SMT) greatly simplifies the creation of subregional models. The SMT fully automates the development of all aspects of a subregional model. The Tool is used by transportation commissions, counties, subregions, and cities wishing to create subregional models based on SCAG’s new Regional Model. The new Tool promotes model consistency between the Region’s various model agencies and greatly reduces the cost and effort required to create subregional models.
Heavy-Duty Truck Model
Southern California Association of Governments (SCAG) developed the Heavy Duty Truck (HDT) model to evaluate important policy choices and investment decisions. The HDT model is a primary analysis tool to support the goods movement policy decisions made by SCAG and regional stakeholders.
Air Quality Modeling & Analysis
EMFAC2007 is an emission factors model developed by the Air Resources Board (ARB) for calculating emission inventories for vehicles in California. This is the emission model approved by the Environmental Protection Agency (EPA) for calculating vehicle emissions for conformity purposes in California.