U.S. Transit Accessibility to Jobs and Workers in 2012

Performance indicators and regional benchmarks compare U.S. census block groups on accessibility to jobs or workers via public transit. Accessibility is modeled using total travel time calculations between block group centroids, including walking, wait times, and transfers. The data reflects transit service from December 2012 and employment/worker counts from 2010.

Use Cases

• Model job accessibility by analyzing total travel time between census block group centroids under a 45-minute threshold.
• Benchmark regional transit performance by comparing accessibility indicators across different metropolitan areas.
• Analyze the relationship between modeled transit wait times and employment counts from 2010.

Strengths

• Accessibility is modeled using a detailed method that includes walking to/from stops, wait times, and transfers.
• Provides consistent benchmarks for comparing neighborhoods (census block groups) across the United States.
• Data is sourced from the U.S. Environmental Protection Agency, an authoritative organization.

Limitations

• Transit service data is from December 2012 and employment data is from 2010, making the dataset temporally stale.
• Coverage is limited to metropolitan regions where transit agencies shared data in the GTFS format, excluding many areas.
• The specific number of rows (census block groups) and columns (indicators) is unknown, limiting assessment of scale.

Provenance

Source

U.S. Environmental Protection Agency

Collection Method

Accessibility was modeled by calculating total travel time between census block group centroids, inclusive of walking, wait times, and transfers, using GTFS transit service data.

Time Range

Transit service: December 2012; Employment/Worker counts: 2010.

Freshness

The metadata was last updated in April 2025, but the underlying data is from 2010-2012.

Geography

Census block groups within metropolitan regions of the United States served by transit agencies sharing GTFS data.