v15.1.0

Commercial Vehicle Model (CVM) updates in the previous version reduced overall traffic volumes on freeways. This resulted in a new effort to improve highway and transit validation of base year 2022.

Following are some highlights of this release. Detailed release notes are available on the documentation website.

• Fixed transit network bug and recalibrated transit ridership
• Updated commercial vehicle demand and recalibrated resident models to get highway validation to acceptable levels
• Updated the number of EV chargers for base and future years and recalibrated vehicle type choice model
• Moved to a new cleaned up version of 15.1.0 database for reporting and visualization
• Miscellaneous config improvements and file clean up

v15.0.2

During the production runs for testing the 2025 Regional Plan initial concept, updates were made to improve firm synthesis and calibration of the Commercial Vehicle Model (CVM).

Following are some highlights of this release. Detailed release notes are available on the documentation website.

• Updated distribution of commercial vehicle type mapping to the categories used in assignment
• Added calibration factors for determining the probability of a tour made by a single- or multi-unit truck terminating at a given stop
• Changed firm synthesis to be done at the TAZ level instead of the MGRA level

v15.0.1

During the production runs for testing the 2025 Regional Plan initial concept, some critical model issues were identified and fixed.

Following are some highlights of this release. Detailed release notes are available on the documentation website.

• TNC_SHARED trip mode choice restricted to be available on ride hail tours only
• Added a new parameter to discount wait times for rapid bus
• Updated EI control inputs based on new analysis
• Fixed bug in CBX enplanements
• Set year after which vehicles must have transponders from 2035 to 2029

v15.0.0

Initial release of ABM3 for use in the 2025 Region Plan (RP). The primary change from ABM2+ is the transition from the Java-based CT-RAMP modeling platform to the open-source Python-based ActivitySim platform.

Following are some highlights of this release. Detailed release notes are available on the documentation website.

• Base year updated from 2016 to 2022
• Moved from a 3-zone system to a 2-zone system
• Added new Commercial Vehicle Model (CVM) built on ActivitySim platform
• Network editing changed from the ArcInfo-based TCOVED to ArcGIS Pro-based TNED
• Model results written to Azure Data Lake

14.3.0

Since the adoption of 2021 Regional Plan (RP) in December 2021, additional model improvements were made, including input changes, software bugs fixes, and new model features. These improvements triggered releasing of ABM version 14.3.0, an update from version 14.2.2 used in 2021RP. ABM version 14.3.0 is for post 2021RP Service Bureau and other project level studies. Improvements included in version 14.3.0 are:

1. Employment allocation corrections
2. A cross-border model bug fix,
3. Airport model update
4. Airport enplanement forecast update
5. Land use customization procedures in ABM2+ version 14.3.0 for project level modeling.

For improvement and bug fix details, please refer to this page 14.3.0 Updates

14.2.2

ABM2+ release for final 2021RP modeling. For improvements and bug fixes, please refer to this page 14.2.2 Updates

13.3.3

Updated ABM1 version for Service Bureau and other ABM1 applications. This version includes automated shadow pricing computation for SB projects and bug fixes.

14.2.1

ABM2+ version used in 2021 Regional Plan. This release has bug fixes and improvements. For details please refer to software release note.

14.2.0

Initial ABM2+ release.

14.1.1

ABM2 release for 2019 Fed RTP.