This part of standard gives recommendations on the general principles of road lighting, gives recommendations on aesthetic and technical aspects, advises on operation and maintenance, and refers to statutory provisions. It gives recommendations for the design of lighting for all types of highways and public thoroughfares, including those specifically for pedestrians and cyclists, and for pedestrian subways and bridges, but it excludes the lighting of vehicular tunnels and underpasses, which is covered in MS 825: Part 2 . It gives recommendations for the design of lighting for urban centres and public amenity areas. It gives additional recommendations for lighting around aerodromes, railways, harbours and navigable waterways, in order to minimise the possibility of the lighting interfering with these modes of transport.