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Applications
Accessibility indicators computed with the methods in this wiki are used across several domains.
- Dutch national network model (PBL), nationwide travel times for car, bicycle, pedestrian and public transport, with published methodology. It underpins the PBL reports Toegang voor iedereen? (2022) and Beter bereikbaar? (2024).
- Worldwide network model, a global car network built per continent from OSM, combined with the GHSL population grid and settlement layer. It produces settlement hierarchies, catchment areas, travel times and distances to settlements by rank, functional rural areas, and traffic flow proxies, and feeds the CRISP model for land use downscaling.
- European network model, travel time analysis across European countries combined with a service allocation procedure, used to study school and service coverage, scale efficiency and network restructuring.
- Planmonitor NOVI, accessibility indicators for national spatial planning policy.
Accessibility measures are calculated and used as driving factors in land use modelling, where the attractiveness of a location for a given activity depends on what it can reach.
In our projects in the social domain, distances over the road network are calculated from dwellings to facilities such as supermarkets, care centres and public transport stops. These distances are suitability factors for housing for people with mobility impairments, where the difference between a straight line and the actual walking route is decisive. See Euclidean versus network distance.
- PC4 travel time matrix for Nederland van Boven (in Dutch), travel time from each PC4 postcode zone to every other zone in the Netherlands. It was used among other things for a national accessibility analysis on nu.nl and for the VPRO programme Nederland van Boven.
- Road distances from every BAG building to the nearest primary school, made available to EduGIS.
See objectvision.nl, accessibility for the full project and publication overview.
Accessibility modelling documentation

Concepts
Networks
- Network data sources
- OSM
- NWB
- GTFS
- Building a routable network
- Network optimisation algorithm
- Travel speeds per mode
Origins & destinations
Computation
- Shortest path and the Dijkstra algorithm
- Origin Destination matrix (trip table)
- Isochrones and catchment areas
- Public transport routing
Indicators
Applications
Network models
Reference