Primary Purpose
The goal of the Subregional Modeling Program is to provide
modeling support and services to SCAG member agencies,
transportation commissions, subregions, and Caltrans. SCAG
recently developed the Subregional Modeling Tool (SMT) to enhance
modeling support to member agencies. The new Tool streamlines the
development of models for agencies wishing to create subregional
models based on SCAG’s Regional Transportation Model. The new SMT
promotes model consistency between the Region’s various modeling
agencies and greatly reduces the cost and effort required to
create subregional models.
About Subregional Modeling Tool
The resulting model provides subregions a consistent tool to
evaluate their plans and to provide SCAG input into the RTP
process based on a common set of assumptions and analytical
methods. Currently three subregional models were built using the
Subregional Modeling Tool including:
- North Los AngHeading 5eles Model
- San Bernardino County Model
- Imperial County Model
In addition, several city level models and corridor studies were
developed using the SMT.
Features
The SMT fully automates the development of all aspects of a
subregional model and includes the following features:
- User friendly model interface;
- Automated routines for assisting model developers to create
new sub-area models;
- Sub-routines to automatically create key model inputs; and
- The model interface allows the modeler to run only the needed
portion of the modeling code, which significantly reduces model
run times.
Framework
The Subregional Modeling Tool is built directly on top of SCAG’s
Regional Model’s computer code. The SMT uses the same basic model
components as the Regional Model, with custom sub-routines to
automate the development of the subregional model inputs. This
ensures that model methods and results are consistent. In
addition, the common model and data structure encourages sharing
of model input data between agencies.
Documents & Resources
Final Report for the SCAG Subregional Model in TransCAD 5.0
User’s Guide for the SCAG Subregional Planning Model in TransCAD 6.0
