opentripplanner/OpenTripPlanner
Oct 2024 – Feb 2026
17 Months active
Languages Used
JavaMarkdownYAMLShellXMLGraphQLPythonProperties
Technical Skills
ArchitectureBackend DevelopmentBuild System ManagementCI/CDCode CleanupCode Organization
Thomas Gran
PROFILE
Thomas Gran
Tore Gran contributed extensively to the opentripplanner/OpenTripPlanner repository, delivering core routing features, API modernization, and robust data ingestion pipelines. He engineered modular, testable backend systems in Java and Python, focusing on transit routing, emissions modeling, and CSV-based data import. Tore refactored key algorithms for transfer generation and delay handling, introduced immutable builder patterns, and enhanced real-time data integration. His work included GraphQL API extensions, improved error handling, and comprehensive documentation updates. By emphasizing code clarity, maintainability, and test coverage, Tore enabled safer deployments and more reliable routing, demonstrating deep expertise in backend development, configuration management, and software architecture.
Overall Statistics
Feature vs Bugs
79%Features
Repository Contributions
591Total
Bugs
54
Commits
591
Features
209
Lines of code
78,617
Activity Months17
Your Network
51 peopleShared Repositories
51
Alexandre DemersMember
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Andrew ByrdMember
Arnljot ArntsenMember
Brandon Martin-AndersonMember
binh-dam-ibigroupMember
OTP BotMember
BredeMember
OTP Changelog BotMember
Work History
February 2026
7 Commits • 1 Features
Feb 1, 2026February 2026 (OpenTripPlanner) monthly summary: Delivered targeted transit-delay handling improvements and algorithm refactors to boost reliability and performance, plus corrections to DST-related tests and public metadata. The work enhances real-time routing accuracy, maintainability, and test coverage, directly supporting better service planning and user experience.
7 Commits • 1 Features
Feb 1, 2026February 2026 (OpenTripPlanner) monthly summary: Delivered targeted transit-delay handling improvements and algorithm refactors to boost reliability and performance, plus corrections to DST-related tests and public metadata. The work enhances real-time routing accuracy, maintainability, and test coverage, directly supporting better service planning and user experience.
February 2026
January 2026
27 Commits • 10 Features
Jan 1, 2026January 2026 (2026-01) OpenTripPlanner: Delivered core routing enhancements, reliability improvements, and maintainability gains that support faster feature delivery and a higher-quality user experience. Highlights include Raptor heuristics enhancement with direct transit search, strengthened test infrastructure, comprehensive documentation updates, and configuration/API hygiene improvements. Also resolved critical DST/multiday trip handling in the departure board and implemented validation cleanup to reduce runtime issues.
January 2026
27 Commits • 10 Features
Jan 1, 2026January 2026 (2026-01) OpenTripPlanner: Delivered core routing enhancements, reliability improvements, and maintainability gains that support faster feature delivery and a higher-quality user experience. Highlights include Raptor heuristics enhancement with direct transit search, strengthened test infrastructure, comprehensive documentation updates, and configuration/API hygiene improvements. Also resolved critical DST/multiday trip handling in the departure board and implemented validation cleanup to reduce runtime issues.
December 2025
34 Commits • 16 Features
Dec 1, 2025Month: 2025-12 monthly summary for opentripplanner/OpenTripPlanner. The month focused on delivering key routing features, stabilizing the build, enhancing debugging capabilities, and improving test coverage. Major business value was realized through API clarity, data accuracy, and developer experience improvements.
34 Commits • 16 Features
Dec 1, 2025Month: 2025-12 monthly summary for opentripplanner/OpenTripPlanner. The month focused on delivering key routing features, stabilizing the build, enhancing debugging capabilities, and improving test coverage. Major business value was realized through API clarity, data accuracy, and developer experience improvements.
December 2025
November 2025
63 Commits • 28 Features
Nov 1, 2025November 2025 delivered a set of focused improvements to the OpenTripPlanner transfer generation and graph-building stack, driving reliability, performance, and real-time data integration. The work emphasizes business value for live routing scenarios, maintainability, and readiness for upcoming via-location features.
November 2025
63 Commits • 28 Features
Nov 1, 2025November 2025 delivered a set of focused improvements to the OpenTripPlanner transfer generation and graph-building stack, driving reliability, performance, and real-time data integration. The work emphasizes business value for live routing scenarios, maintainability, and readiness for upcoming via-location features.
October 2025
26 Commits • 8 Features
Oct 1, 2025October 2025 OpenTripPlanner monthly summary focusing on API modernization, reliability, and developer velocity. Delivered a broad refactor to adopt withX builders across core builders (FareAttributeBuilder, AStarBuilder, TransitPreferences.Builder, DebugRequestBuilder, JourneyRequestBuilder, TransitRequestBuilder) to enable fluent construction and safer defaults. Refactored EncodedPolyline: moved to o.o.api.model.geometry, removed Serializable, added lazy initialization, renamed encode() to of(), and exposed distance calculations in GraphQL. Renamed TripDelaysDto to TripDelaysAgregator across the codebase for clarity. Documentation updates added CLAUDE.md, Empirical Delay Sandbox docs, and a PR rejection template. Fixed release workflow: checked bump.ser.ver.id in custom-release.py and switched changelog to use next-version-tag. Addressed code quality from reviews (requireNonNull, replace withX, fixed empiricalDelay typos).
26 Commits • 8 Features
Oct 1, 2025October 2025 OpenTripPlanner monthly summary focusing on API modernization, reliability, and developer velocity. Delivered a broad refactor to adopt withX builders across core builders (FareAttributeBuilder, AStarBuilder, TransitPreferences.Builder, DebugRequestBuilder, JourneyRequestBuilder, TransitRequestBuilder) to enable fluent construction and safer defaults. Refactored EncodedPolyline: moved to o.o.api.model.geometry, removed Serializable, added lazy initialization, renamed encode() to of(), and exposed distance calculations in GraphQL. Renamed TripDelaysDto to TripDelaysAgregator across the codebase for clarity. Documentation updates added CLAUDE.md, Empirical Delay Sandbox docs, and a PR rejection template. Fixed release workflow: checked bump.ser.ver.id in custom-release.py and switched changelog to use next-version-tag. Addressed code quality from reviews (requireNonNull, replace withX, fixed empiricalDelay typos).
October 2025
September 2025
31 Commits • 9 Features
Sep 1, 20252025-09 monthly summary for opentripplanner/OpenTripPlanner: focused delivery of the Empirical Delay initiative, reinforced by CSV ingestion, robust parsing, testing support, and stability improvements. Demonstrated strong end-to-end delivery, API integration, and code quality enhancements with tangible business value for transit delay analysis and planning.
September 2025
31 Commits • 9 Features
Sep 1, 20252025-09 monthly summary for opentripplanner/OpenTripPlanner: focused delivery of the Empirical Delay initiative, reinforced by CSV ingestion, robust parsing, testing support, and stability improvements. Demonstrated strong end-to-end delivery, API integration, and code quality enhancements with tangible business value for transit delay analysis and planning.
August 2025
18 Commits • 4 Features
Aug 1, 2025Summary for 2025-08: The OpenTripPlanner team delivered foundational improvements in data ingestion, observability, and release processes, strengthening reliability and business value across the platform.
18 Commits • 4 Features
Aug 1, 2025Summary for 2025-08: The OpenTripPlanner team delivered foundational improvements in data ingestion, observability, and release processes, strengthening reliability and business value across the platform.
August 2025
July 2025
3 Commits • 2 Features
Jul 1, 2025July 2025 monthly summary for OpenTripPlanner focusing on test infrastructure improvements for street mode linking and tightening stop-to-street linking constraints. Delivered more robust test coverage, improved data realism, and enforced a 100m linkage constraint to increase routing accuracy, contributing to safer deployments and reduced regression risk.
July 2025
3 Commits • 2 Features
Jul 1, 2025July 2025 monthly summary for OpenTripPlanner focusing on test infrastructure improvements for street mode linking and tightening stop-to-street linking constraints. Delivered more robust test coverage, improved data realism, and enforced a 100m linkage constraint to increase routing accuracy, contributing to safer deployments and reduced regression risk.
June 2025
37 Commits • 8 Features
Jun 1, 2025June 2025 highlights for OpenTripPlanner: Delivered a robust PR handling and Git integration refactor that aligns versioning (latest/next) and PR metadata with GitHub data, facilitating reliable PR-to-release workflows. Strengthened release processes with PR existence checks and improved version resolution logic, reducing release risk and turnaround time. Fixed a serialization bug to ensure PR metadata is accurately stored and consumed by downstream tooling. Improved developer experience with documentation cleanups and custom-release-extension UX enhancements, including clearer output and adherence to code-review guidance. Expanded test coverage and code quality across transit mode mappings and request/mapper components, including unit tests for SelectRequestMapper and TransitFilter mappers, reinforcing reliability and maintainability.
37 Commits • 8 Features
Jun 1, 2025June 2025 highlights for OpenTripPlanner: Delivered a robust PR handling and Git integration refactor that aligns versioning (latest/next) and PR metadata with GitHub data, facilitating reliable PR-to-release workflows. Strengthened release processes with PR existence checks and improved version resolution logic, reducing release risk and turnaround time. Fixed a serialization bug to ensure PR metadata is accurately stored and consumed by downstream tooling. Improved developer experience with documentation cleanups and custom-release-extension UX enhancements, including clearer output and adherence to code-review guidance. Expanded test coverage and code quality across transit mode mappings and request/mapper components, including unit tests for SelectRequestMapper and TransitFilter mappers, reinforcing reliability and maintainability.
June 2025
May 2025
49 Commits • 20 Features
May 1, 2025May 2025 focused on API modernization, reliability, and data-import enhancements for OpenTripPlanner. Key work included enabling CAR transfers with ferries during NeTEx import, extending emissions support to handle negative CO2 values, and sweeping refactors to standardize request objects and builders across Transit/Route APIs, improving safety, consistency, and maintainability. Additional investments in logging, documentation, code quality, and targeted bug fixes enhanced stability and data correctness across the project.
May 2025
49 Commits • 20 Features
May 1, 2025May 2025 focused on API modernization, reliability, and data-import enhancements for OpenTripPlanner. Key work included enabling CAR transfers with ferries during NeTEx import, extending emissions support to handle negative CO2 values, and sweeping refactors to standardize request objects and builders across Transit/Route APIs, improving safety, consistency, and maintainability. Additional investments in logging, documentation, code quality, and targeted bug fixes enhanced stability and data correctness across the project.
April 2025
77 Commits • 24 Features
Apr 1, 20252025-04 monthly summary for opentripplanner/OpenTripPlanner. Delivered a major refactor aligning emissions-related code under a single emission namespace, significantly improving maintainability and onboarding. Implemented per-leg emission data and exposed emissions through the Transmodel API, unlocking granular carbon insights for route planning and customer-facing dashboards. Strengthened data reliability with improved emission data I/O (datasource injection, per-datasource progress logging) and updated tests and documentation to reflect the emission-domain model. Addressed critical reliability issues and quality improvements through targeted bug fixes and test refinements.
77 Commits • 24 Features
Apr 1, 20252025-04 monthly summary for opentripplanner/OpenTripPlanner. Delivered a major refactor aligning emissions-related code under a single emission namespace, significantly improving maintainability and onboarding. Implemented per-leg emission data and exposed emissions through the Transmodel API, unlocking granular carbon insights for route planning and customer-facing dashboards. Strengthened data reliability with improved emission data I/O (datasource injection, per-datasource progress logging) and updated tests and documentation to reflect the emission-domain model. Addressed critical reliability issues and quality improvements through targeted bug fixes and test refinements.
April 2025
March 2025
84 Commits • 34 Features
Mar 1, 2025March 2025 performance summary for opentripplanner/OpenTripPlanner focused on core refactors that strengthen stability, scalability, and business value. Key outcomes include immutable itinerary modeling, unified cost handling, broader adoption of ItineraryBuilder, enhanced test coverage, and release-readiness improvements. The changes lay the groundwork for safer concurrency, easier feature integration, and more predictable planning results while maintaining a strong emphasis on code quality and maintainability.
March 2025
84 Commits • 34 Features
Mar 1, 2025March 2025 performance summary for opentripplanner/OpenTripPlanner focused on core refactors that strengthen stability, scalability, and business value. Key outcomes include immutable itinerary modeling, unified cost handling, broader adoption of ItineraryBuilder, enhanced test coverage, and release-readiness improvements. The changes lay the groundwork for safer concurrency, easier feature integration, and more predictable planning results while maintaining a strong emphasis on code quality and maintainability.
February 2025
55 Commits • 23 Features
Feb 1, 2025February 2025 contributions focused on strengthening path accuracy, API robustness, and build/test maintainability for OpenTripPlanner. Key work centered on feature delivery that enhances user-facing routing quality, plus targeted bug fixes that improve reliability and stability. The effort also advanced the project’s maintainability through refactors, improved testing infrastructure, and build configuration improvements, aligning with longer-term performance and scalability goals for complex transit queries.
55 Commits • 23 Features
Feb 1, 2025February 2025 contributions focused on strengthening path accuracy, API robustness, and build/test maintainability for OpenTripPlanner. Key work centered on feature delivery that enhances user-facing routing quality, plus targeted bug fixes that improve reliability and stability. The effort also advanced the project’s maintainability through refactors, improved testing infrastructure, and build configuration improvements, aligning with longer-term performance and scalability goals for complex transit queries.
February 2025
January 2025
16 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for opentripplanner/OpenTripPlanner: Delivered feature-rich API customization, improved data integrity, and reinforced CI practices, enabling stronger product offering and reliability. Key outcomes include profile-based Transmodel API documentation with GraphQL injection, coordinate-based transfers in itinerary mapping, fixes for bookWhen null, non-null StreetLeg.walkSteps, and UTF-8 property file handling.
January 2025
16 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for opentripplanner/OpenTripPlanner: Delivered feature-rich API customization, improved data integrity, and reinforced CI practices, enabling stronger product offering and reliability. Key outcomes include profile-based Transmodel API documentation with GraphQL injection, coordinate-based transfers in itinerary mapping, fixes for bookWhen null, non-null StreetLeg.walkSteps, and UTF-8 property file handling.
December 2024
12 Commits • 5 Features
Dec 1, 2024December 2024 monthly summary for opentripplanner/OpenTripPlanner focusing on delivering business value through schema accessibility, packaging modernization, routing consistency, and build-data improvements, complemented by release automation and code quality enhancements.
12 Commits • 5 Features
Dec 1, 2024December 2024 monthly summary for opentripplanner/OpenTripPlanner focusing on delivering business value through schema accessibility, packaging modernization, routing consistency, and build-data improvements, complemented by release automation and code quality enhancements.
December 2024
November 2024
38 Commits • 11 Features
Nov 1, 2024November 2024 accomplishments focused on stabilizing and modernizing the Raptor-based testing stack, aligning test coverage with current OpenTripPlanner features, and implementing packaging and observability improvements to shorten release cycles and reduce risk. Key work included modernization of the Raptor test framework with reusable components, cleanup of outdated tests, and improvements to test data models and request mapping. In addition, OTP feature validation, shading packaging, and Maven POM cleanup streamlined deployments. Minor fixes to Siri URL handling and improved startup/shutdown logging/docs enhanced reliability and developer experience.
November 2024
38 Commits • 11 Features
Nov 1, 2024November 2024 accomplishments focused on stabilizing and modernizing the Raptor-based testing stack, aligning test coverage with current OpenTripPlanner features, and implementing packaging and observability improvements to shorten release cycles and reduce risk. Key work included modernization of the Raptor test framework with reusable components, cleanup of outdated tests, and improvements to test data models and request mapping. In addition, OTP feature validation, shading packaging, and Maven POM cleanup streamlined deployments. Minor fixes to Siri URL handling and improved startup/shutdown logging/docs enhanced reliability and developer experience.
October 2024
14 Commits • 4 Features
Oct 1, 2024October 2024: Key architectural improvements, test stability, and feature clarity delivered for OpenTripPlanner. Focused on modularization and data model generalization, while ensuring transfer generation robustness and up-to-date documentation. Notable outcomes include CI performance test stabilization, codebase restructuring to OTP_UTILS, generalization of vehicleType, inclusion of empty rail stops in transfers, and updated Sorlandsbanen feature docs.
14 Commits • 4 Features
Oct 1, 2024October 2024: Key architectural improvements, test stability, and feature clarity delivered for OpenTripPlanner. Focused on modularization and data model generalization, while ensuring transfer generation robustness and up-to-date documentation. Notable outcomes include CI performance test stabilization, codebase restructuring to OTP_UTILS, generalization of vehicleType, inclusion of empty rail stops in transfers, and updated Sorlandsbanen feature docs.
October 2024
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Quality Metrics
Correctness94.0%
Maintainability94.0%
Architecture91.8%
Performance87.6%
AI Usage20.6%
Skills & Technologies
Programming Languages
BashGraphQLGroovyJSONJavaJavaScriptMarkdownPropertiesPythonSQL
Technical Skills
AI IntegrationAPI DesignAPI DevelopmentAPI DocumentationAPI IntegrationAPI designAPI developmentAlgorithm DesignAlgorithm OptimizationArchitectureBackend DevelopmentBug FixingBuild AutomationBuild ConfigurationBuild Management
Repositories Contributed To
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