In terms of limitations, georeferencing using postcode information is less accurate in rural areas, as each postcode covers a larger
geographic area because houses are fewer and more dispersed than in urban areas. However, postcode information is widely used to geolocate
rural residents and was the only option available for 20% of our sample who lived in a rural part of the study area.
Modelling multimodal trips was problematic, as participants did not specify where or for how long they walked or cycled when taking
multimodal journey to or from work. This meant the active travel element of the journey could not be modelled. We assumed the
motorised mode comprised the largest proportion of the journey, and therefore it was that road network that was used for modelling.