The County of Cumberland planning scheme, commonly known as the Cumberland Plan, was a land use and transport strategy developed by the Cumberland County Council in Sydney in 1948 and adopted by the Government of New South Wales in 1951. The plan's key elements were a green belt around Sydney and a radial motorway network, neither of which eventuated on their intended scale. An independent and illustrated account of the preparation of the plan was published by Arthur Winston in 1957. The plan was eventually superseded by the Sydney Region Outline Plan in 1968.