The Milton Keynes grid road system is a network of national speed limit, fully landscaped routes that form the top layer of the street hierarchy for both for private and public transport in Milton Keynes, (ceremonial) Buckinghamshire. The system is unique in the United Kingdom for its innovative use of street hierarchy principles: the grid roads run in between districts rather than through them. These facilitate higher speed limits due to the absence of buildings close to the roads. High-speed motor traffic is segregated from pedestrian and leisure cycling traffic, which uses the alternative Milton Keynes redway system.