NACTO is a coalition of transport authorities in the USA, their mission being to "exchange of transportation ideas, insights, and practices among large central cities while fostering a cooperative approach to key national transportation issues.&qu
Much derided by cycle campaigners as a joke ("Notional Cycling Network" or "National Cycling Not-work" for example), the NCN is a bold attempt at creating a network of cycle routes across Britain.
Used to describe a number of connected cycle routes. In Britain this word has been used to describe very weak networks, such as the National Cycle Network.
A more well-defined concept is the Grid, which is a network with specified density.