SANDAG/ABM
Oct 2024 – Oct 2025
8 Months active
Languages Used
CSVPythonJavaYAMLcsvyamlBatchProperties
Technical Skills
Data ConfigurationData ProcessingPandasScriptingBackend DevelopmentCalibration
aber-sandag
PROFILE
Aber-sandag
Over eight months, Aber contributed to the SANDAG/ABM repository by developing and refining core travel-demand modeling features, focusing on data integrity, calibration, and system reliability. Aber implemented enhancements in Python and Pandas, addressing issues in data preprocessing, configuration management, and simulation modeling. Their work included calibrating micromobility and bike usage, improving toll factor logic, and unifying environment management for batch deployments. Aber also delivered robust error handling for batch runs and clarified documentation to support onboarding and maintainability. The depth of their engineering is reflected in careful bug fixes, model tuning, and the integration of CSV parsing and scripting workflows.
Overall Statistics
Feature vs Bugs
48%Features
Repository Contributions
47Total
Bugs
12
Commits
47
Features
11
Lines of code
2,551
Activity Months8
Your Network
14 people
Work History
October 2025
4 Commits • 1 Features
Oct 1, 2025Concise monthly summary for 2025-10 focused on the SANDAG/ABM repository. Key deliverables include unified UV-based environment management, robust interpreter handling for subprocesses, and corrected TNC_LOC transfer skim calculations. These changes improve reproducibility, stability in batch deployments, data accuracy, and overall deployment reliability. Notable impact: reduced environment-related failures, consistent UV activation across scripts, and accompanying documentation updates detailing the UV transition (including asim_140).
4 Commits • 1 Features
Oct 1, 2025Concise monthly summary for 2025-10 focused on the SANDAG/ABM repository. Key deliverables include unified UV-based environment management, robust interpreter handling for subprocesses, and corrected TNC_LOC transfer skim calculations. These changes improve reproducibility, stability in batch deployments, data accuracy, and overall deployment reliability. Notable impact: reduced environment-related failures, consistent UV activation across scripts, and accompanying documentation updates detailing the UV transition (including asim_140).
October 2025
August 2025
5 Commits • 1 Features
Aug 1, 2025Monthly Summary for 2025-08 (SANDAG/ABM): Focused on stabilizing core components, fixing critical edge cases in micromobility flows, and refining model calibration to improve decision accuracy and business value. Delivered targeted fixes to prevent disruption, sharpen availability logic, and align configuration with actual usage patterns. Result: more reliable scheduling decisions, reduced runtime risk, and better resource allocation signals across shared e-bikes and transit onboarding.
August 2025
5 Commits • 1 Features
Aug 1, 2025Monthly Summary for 2025-08 (SANDAG/ABM): Focused on stabilizing core components, fixing critical edge cases in micromobility flows, and refining model calibration to improve decision accuracy and business value. Delivered targeted fixes to prevent disruption, sharpen availability logic, and align configuration with actual usage patterns. Result: more reliable scheduling decisions, reduced runtime risk, and better resource allocation signals across shared e-bikes and transit onboarding.
July 2025
6 Commits • 1 Features
Jul 1, 2025July 2025 monthly work summary for SANDAG/ABM focusing on tolling factor enhancements and related reliability improvements. Delivered HOV-based toll factor keying, traceability logging for toll factor matching, robust loading and error handling for vehicle class toll factors, and removal of obsolete references. These changes improve accuracy of toll calculations, reduce runtime errors, and streamline maintainability.
6 Commits • 1 Features
Jul 1, 2025July 2025 monthly work summary for SANDAG/ABM focusing on tolling factor enhancements and related reliability improvements. Delivered HOV-based toll factor keying, traceability logging for toll factor matching, robust loading and error handling for vehicle class toll factors, and removal of obsolete references. These changes improve accuracy of toll calculations, reduce runtime errors, and streamline maintainability.
July 2025
May 2025
1 Commits
May 1, 2025May 2025 performance summary for SANDAG/ABM: Focused on correcting Bike Logsum generation documentation to improve data lineage and maintainability. Updated file path references to reflect actual output locations and clarified where generated CSVs reside.
May 2025
1 Commits
May 1, 2025May 2025 performance summary for SANDAG/ABM: Focused on correcting Bike Logsum generation documentation to improve data lineage and maintainability. Updated file path references to reflect actual output locations and clarified where generated CSVs reside.
April 2025
1 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary focusing on documentation and knowledge transfer for the Bike Logsum Model in the SANDAG/ABM repository. Delivered a comprehensive documentation update detailing usage, design, inputs/outputs, and the calculation methodology for bike logsums and times with route- and mode-choice factors. This enhances maintainability, onboarding, and cross-team understanding. No major bug fixes were logged this month; emphasis was on clear documentation and alignment with modeling workflow.
1 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary focusing on documentation and knowledge transfer for the Bike Logsum Model in the SANDAG/ABM repository. Delivered a comprehensive documentation update detailing usage, design, inputs/outputs, and the calculation methodology for bike logsums and times with route- and mode-choice factors. This enhances maintainability, onboarding, and cross-team understanding. No major bug fixes were logged this month; emphasis was on clear documentation and alignment with modeling workflow.
April 2025
December 2024
10 Commits • 4 Features
Dec 1, 2024December 2024 — SANDAG/ABM: Delivered targeted enhancements to improve model fidelity, data quality, and batch reliability. Key features delivered include updating the work distance coefficient and bike mode share to reflect updated network conditions, aligning bike lane field names to ABBikeLn and BABikeLn for accurate data processing, and cleaning up data outputs by removing unnecessary skim columns and standardizing skim formatting. Major reliability improvements include a robust batch MAAS run handler that terminates the entire run gracefully on MAAS failures with environment restoration. A bug fix improved escort_participants handling across preprocessing and visualization by enforcing string typing, correcting missing-value handling, and preserving existing values when data is missing. These efforts collectively enhance travel-demand accuracy, reduce downstream data issues, and improve end-to-end run reliability and visibility into modeling work.
December 2024
10 Commits • 4 Features
Dec 1, 2024December 2024 — SANDAG/ABM: Delivered targeted enhancements to improve model fidelity, data quality, and batch reliability. Key features delivered include updating the work distance coefficient and bike mode share to reflect updated network conditions, aligning bike lane field names to ABBikeLn and BABikeLn for accurate data processing, and cleaning up data outputs by removing unnecessary skim columns and standardizing skim formatting. Major reliability improvements include a robust batch MAAS run handler that terminates the entire run gracefully on MAAS failures with environment restoration. A bug fix improved escort_participants handling across preprocessing and visualization by enforcing string typing, correcting missing-value handling, and preserving existing values when data is missing. These efforts collectively enhance travel-demand accuracy, reduce downstream data issues, and improve end-to-end run reliability and visibility into modeling work.
November 2024
16 Commits • 3 Features
Nov 1, 2024November 2024 (2024-11) monthly summary for SANDAG/ABM focusing on business value and technical achievements. Delivered core multi-modal travel-time accuracy and accessibility refinements, calibrated micromobility/bike/e-bike usage with policy enforcement, and introduced configuration controls to accelerate model experimentation—all while cleaning airport matrices to reduce drift. These changes increased planning reliability, policy compliance, and operational efficiency for ABM scenarios.
16 Commits • 3 Features
Nov 1, 2024November 2024 (2024-11) monthly summary for SANDAG/ABM focusing on business value and technical achievements. Delivered core multi-modal travel-time accuracy and accessibility refinements, calibrated micromobility/bike/e-bike usage with policy enforcement, and introduced configuration controls to accelerate model experimentation—all while cleaning airport matrices to reduce drift. These changes increased planning reliability, policy compliance, and operational efficiency for ABM scenarios.
November 2024
October 2024
4 Commits
Oct 1, 2024October 2024 — SANDAG/ABM delivered critical data integrity improvements and more accurate travel-time reporting. Focus areas included skim data column mapping, external zone assignment, and micromobility time calculations, with ownership now correctly attributed to individuals rather than tours. These changes enhance model fidelity, reduce data drift, and improve downstream decision support.
October 2024
4 Commits
Oct 1, 2024October 2024 — SANDAG/ABM delivered critical data integrity improvements and more accurate travel-time reporting. Focus areas included skim data column mapping, external zone assignment, and micromobility time calculations, with ownership now correctly attributed to individuals rather than tours. These changes enhance model fidelity, reduce data drift, and improve downstream decision support.
Activity
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Quality Metrics
Correctness85.4%
Maintainability86.4%
Architecture83.0%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
BatchCSVJavaMarkdownPropertiesPythonYAMLcsvyaml
Technical Skills
Backend DevelopmentBug FixCSV ParsingCalibrationCode CleanupCode RefactoringConfiguration ManagementData AnalysisData CalibrationData ConfigurationData ImportData ModelingData ParsingData PreprocessingData Processing
Repositories Contributed To
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