A principal shared path (PSP) is a high-quality shared path for walking and riding, built to Main Roads WA PSP standard. This generally means the path will be 4 m wide, have adequate lighting and be grade separated at intersections.
PSPs form the backbone of the Western Australian bike network, and often follow freeway and rail corridors. PSPs provide for safer off-road travel, with minimal interruption from other traffic, and more direct riding and walking trips.
To create more enjoyable walking and riding experiences, where possible, efforts are made to enhance the amenity of PSPs. For example, artwork may be included in walls and underpasses and the incorporation of natural landscaping is prioritised as part of the green transport route initiative.