Public Transit Systems as Open Data: A New Project Maps Global Transit Infrastructure

The Project

publictransit.systems is a new open data project that aims to catalog public transit systems worldwide — including lines, stations, railcars, and historical information. The project appeared on Hacker News with growing interest.

What It Offers

The platform provides structured data on:

• Transit lines: Routes, frequencies, and coverage areas
• Stations: Locations, connections, and facilities
• Railcars and vehicles: Fleet information, capacity, and specifications
• History: Chronological development of transit networks

Why Open Transit Data Matters

For Developers

• Apps: Real-time routing and journey planning
• Urban planning: Transit accessibility analysis
• Research: Mobility patterns and network optimization

For Cities

• Benchmarking: Compare transit systems across cities
• Policy: Data-driven investment decisions
• Transparency: Public accountability for transit agencies

For Riders

• Trip planning: Better tools for navigating unfamiliar systems
• Accessibility: Understanding system coverage gaps
• Historical context: How transit networks evolved

The Challenge of Transit Data

Public transit data has traditionally been:

• Fragmented: Each city/agency has different formats
• Incomplete: Historical data is often lost
• Inaccessible: Locked in proprietary systems
• Inconsistent: Varying standards across countries

Global Context

This project joins other transit data initiatives:

• GTFS (General Transit Feed Specification): The de facto standard for transit data
• OpenStreetMap: Community-mapped transit infrastructure
• City-specific open data portals: Municipal transit APIs

Looking Ahead

As cities worldwide invest in transit expansion, having a unified, open database of global transit infrastructure becomes increasingly valuable for research, planning, and the development of mobility tools.

The project is available at publictransit.systems.