This section describes the creation of the four transportation networks that are required as inputs to the calculation of the comprehensive accessibility scores. The four networks are the private vehicle, cycling, walking and public transport networks.
The private vehicle network was generated from street centreline data. It forms the basis of the cycling network and was used to generate a base walking network, which underwent refinement to become a walking network. The walking network was used as a base to create the public transport network. Spatial and temporal availability of public transport was then added to this network. It should be noted the public transport network developed for this project includes only bus services; however, the methodology used could also be applied to rail and ferry services.
Due to the staged construction of the networks, where each successive network was built on those previously created, it is recommended they be developed in the order presented in this chapter.