Welcome to the San Diego Association of Governments (SANDAG) Activity-Based Model (ABM) code repository!
The SANDAG ABM is a sophisticated transportation modeling tool that simulates individual and household travel behavior throughout the San Diego region. It captures a wide range of daily travel activities — including commuting to work or school, shopping, accessing healthcare, and recreation — by modeling the decisions that drive those trips.
The ABM accounts for a variety of weekday travel markets, including:
- Resident travel within the San Diego region
- Cross-border travel of Mexico residents traveling into the region
- Visitor travel of overnight visitors within the region
- External travel of non-residents crossing San Diego County’s borders
- Airport passenger travel convering:
- San Diego International Airport
- Cross Border Xpress (CBX) bridge to Tijuana International Airport
- Commercial and freight travel
The SANDAG ABM plays a critical role in regional planning and policy development. It supports the creation of the Regional Plan, helping transportation planners and policymakers:
- Evaluate the performance of transportation projects
- Analyze the impacts of proposed policies
- Support data-driven decision-making on complex mobility issues in the region
For detailed information on how the model works, including setup instructions and technical specifications, please refer to the full documentation: