The size of the PCA is determined by the extent of infrastructure works being delivered by the project. In the case of METRONET, the PCA needs to encompass the station, bus transfer and park and ride facilities as a minimum. However, in most cases it will also need to be large enough to include any changes to roads or pedestrian/cyclist pathways, and may need to include any early site works such as clearing, temporary fencing and relocation of services.