The 2015 Public Transport Accessibility Levels (PTALs) measure the density of London's public transport network. Developed by Transport for London and the London Borough of Hammersmith and Fulham, the data grades 100m grid squares across Greater London from 0 (very poor) to 6b (excellent). The measure reflects walking time to access points, service reliability, number of services, and average waiting times.
Use Cases
- Model urban development suitability based on public transport accessibility scores.
- Analyze correlations between transport access and access to key services based on the ATOS methodology mentioned.
- Assess transport network density across Greater London based on the 100m grid square scores.
Strengths
- Methodology developed in 1992 and has been thoroughly reviewed and tested.
- Scores are provided for 100m grid squares, offering fine-grained spatial detail.
- The model has been agreed as the most appropriate for use across London by a borough-led development group.
Limitations
- Row count is unknown, which may limit suitability assessment.
- Column-level documentation is absent; field semantics must be inferred after download.
- The methodology does not consider service speed, crowding, or ease of interchange.
Provenance
- Source
- Greater London Authority / Transport for London
- Collection Method
- Calculated from walk access time and public transport service availability.
- Time Range
- 2015
- Freshness
- Last updated 2026-06-24 21:09:13.571079; freshness should be verified.
- Geography
- Greater London