Dostopnost do javnega potniškega prometa v Ljubljani po metodi PTAL ( = Accessibility to public transport using the PTAL method : the case of Ljubljana)

Abstract

This article presents modelling results of accessibility to public transport using the PTAL method (Public Transport Accessibility Level) on the case of Ljubljana. The method takes into account the spatial accessibility to bus stops as well as the frequency of bus rides. It was adapted to the ArcGIS software; then, the accessibility was calculated with a network analysis based on the network of footpaths. The results demonstrate notable spatial differences in accessibility to public city bus transport in Ljubljana: it is the best in the wider city centre and along most of the main arterial roads and the poorest in less densely inhabited city outskirts. Accessibility to public transport was analysed in more detail in selected residential areas, educational, and commercial hubs, revealing a lesser accessibility to more recently constructed buildings. In addition, certain inconsistencies appeared between the accessibility to public transport and the parking zones determined in the Implementation Spatial Plan of the City Municipality of Ljubljana. Despite a few deficiencies, the PTAL method is an important step on the road to a more integral accessibility modelling.The method could also be used for spatial planning in other larger Slovenian cities as the basis for determining the appropriate construction density and parking norms or for optimizing public transport networks.

Keywords

• accessibility
• public transport
• geographical information systems
• network analysis
• PTAL
• Ljubljana