v15.4.0

ActivitySim 1.4.0
EMME OpenPaths 25

This significant release upgrades EMME to OpenPaths 25 in addition to switching to UV as the Python package manager. With the EMME upgrade, a Python 27 environment is no longer needed.

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

• EMME version upgraded to OpenPaths 25
• Packager manager changed from Anaconda to UV
• SOV toll volumes bug fix for managed lanes

v15.3.1

This release fixes bugs that were identified while testing with version 15.3.0. Minor recalibration of bike and transit trips was also performed. Final 2025 Regional Plan scenarios will be completed with this version.

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

• Settings manager can now be run from Anaconda prompt (as opposed to only within Emme)
• Bug fixes in e-bike utility calculation
• Documentation added for re-running completed scenarios

v15.3.0

This release upgrades ABM3 to the latest ActivitySim version 1.4.0. In addition, the Commercial Vehicle Model (CVM) was also updated to use ActivitySim 1.4.0. The outputs of Draft 2025 Regional Plan scenarios using this release are close to those from using v15.2.1. Final 2025 Regional Plan modeling will begin with this version.

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

• ActivitySim version upgraded to v1.4.0 for ABM3 (including CVM)
• Model outputs now written to Databricks Unity Catalog
• New centralized settings manager that avoids duplicates in ActivitySim config files
• Bugfixes include SAN airport 2022 enplanements and correct application of toll discounts by HOV type

v15.2.2

This release is focused on improving documentation and refactoring "under the hood".

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

• Refactoring of 2zoneSkim.py script
• Work-home-calibration coefficients can now be set in parametersByYears.csv
• Documentation website updates
• Cleanup of unused files and configuration settings

v15.2.1

Multiple bugs were fixed, and some recalibration was done since the release of version 15.2.0. This was used for model runs for the Draft 2025 Regional Plan.

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

• Calibration of out-of-direction stop distance for at-work tours
• Separate calibration of e-bike trips made by owners versus shared micromobility
• Updated bike/AT network input to included bike lanes
• Improved MAAS model robustness
• GUI updates for setting up 2032 and 2040 scenarios
• Travel time reporter updates

v15.2.0

Several significant updates were made to this release including bugfixes and feature enhancements. This is planned to be used for model runs for the Draft 2025 Regional Plan.

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

• TNC-to-Transit modes now use KNR-to-Transit skims resulting in disk space and memory savings
• Reduced sensitivity of electric vehicle ownership to number of chargers
• More accurate flexible fleet ridership predictions for zero-vehicle households
• Allow owned E-bikes for trips outside areas with shared micromobility
• Removed the use of a Java-based walk logsum program
• Improved travel time reporting between MGRAs

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