Open tools for understanding human mobility.
HHTdiary is an independent, open-source initiative exploring how digital tools can make travel diary collection and travel behavior research more accessible.
We develop practical, privacy-conscious applications that bridge the gap between everyday travel experiences and transportation research.
Our approach is simple: build useful tools, keep them transparent, and give users control over their own data.
🌐 Website: hhtdiary.org
A personal travel diary, built around privacy and simplicity.
TripLibre is a mobile application designed to help users record, review, and understand their daily travel activities.
Rather than requiring users to remember and manually reconstruct every trip, TripLibre explores a more automated approach to travel diary collection while preserving opportunities for user review and correction.
Key principles:
- Privacy-first, with local data storage
- No account or login required
- User-controlled data export
- Open and transparent development
- Practical applications for personal use and transportation research
Platform: iOS, built with React Native and Expo.
Project Website · GitHub Repository
Exploring what travel diaries can tell us.
TripLibreLab is a planned companion project that extends the usefulness of travel diary data beyond collection.
Its initial focus is on importing and replaying TripLibre travel records, enabling users to revisit, visualize, and share their travel experiences.
Future directions may include:
- Interactive travel diary reconstruction
- Activity pattern visualization
- AI-assisted interpretation and simulation
- Exploratory mobility analytics
TripLibreLab is intended as an advisory and experimental environment, without modifying the original travel records.
Status: Early planning and development.
Travel behavior research has long relied on household travel surveys, GPS tracking, and self-reported travel diaries. These methods provide valuable information, but collecting accurate and detailed mobility data can be costly and demanding for both participants and researchers.
We believe there is room to experiment with simpler, more flexible, and more transparent approaches.
HHTdiary explores how modern mobile development, geospatial technologies, and computational methods can help address these challenges.
Our work is guided by three ideas:
People should control their data. Mobility records can reveal highly personal information. Privacy should be a fundamental design consideration, not an afterthought.
Research tools should be usable. Technical sophistication matters, but tools must also work for the people expected to use them.
Open development encourages learning. Documentation, reproducibility, and honest discussion of limitations are essential parts of building useful software.
Our projects explore a combination of:
- Mobile development: React Native, Expo, TypeScript
- Geospatial technology: MapLibre, GPS-based mobility analysis
- Data management: SQLite, portable data formats
- Research applications: Travel diaries, human mobility, transportation analytics
- AI-assisted development: Experimentation with AI-supported software engineering and analysis
Technology choices may evolve as the projects develop.
HHTdiary sits at the intersection of transportation planning, geographic information science, and open-source software development.
We welcome constructive feedback, research discussions, bug reports, and contributions from people interested in mobility data, transportation research, and civic technology.
HHTdiary is an independent initiative and is not an official university research program or institutional data collection service.
Explore our repositories, read the documentation, report issues, or share ideas for future development.
