Surfaces should be chosen with due regard to whole-life costs (off-carriageway as well as on). Materials should always be machine laid to ensure a smooth running surface.
For aesthetic, environmental and cost reasons coloured surfaces should only be used at potential hazards and conflict points, or where encroachment by motor vehicles is a problem. Any decision to use coloured surfacing for all cycle facilities will need to balance the potential safety benefits against the future maintenance commitment that will be required.