Numbered-node cycle network

The numbered-node cycle network (Dutch: , German: [formal] and ["bike-by-numbers", informal]) is an award-winning wayfinding system. It spans the Netherlands, Belgium, parts of Germany, and parts of Croatia, and is expanding rapidly, . Each intersection or node is given a number, and the numbers are signposted, so the cyclist always knows which way to go to get to the next node.
Numbers are not unique, but nodes with the same number are placed far apart, so that they can't be confused. To find a route, the cyclist uses a list of node numbers (the sequence of intersections they will pass through). The list is generated with a website, or a downloaded, roadside or paper map. Intersection numbers need little translation.
Bike networks are, by nature, more distributed than car routes, with more junctions; they do not gather all cyclists onto arterial bike routes. The numbered-node network makes long-distance bike travel simpler (by making it harder to get lost), and faster (by making frequent stops to check a map needless). Areas on the numbered-node network cite substantial economic benefits, including revenues from increased bike tourism.
The numbered-node network is more flexible than previous signage systems, which only indicated long, pre-determined routes. The numbered-node network signage can be used to plan and follow any arbitrary route through the network. This is more usable for utility cycling.
History.
The system was designed by . Bollen worked as a mine engineer from 1971 to 1990, and then joined Regionaal Landschap Kempen en Maasland (RLKM). RLKM did not ask Bollen to design the scheme; he volunteered it. The idea of labelling each intersection was inspired by his annoyance at having to stop at each intersection to read the map, when out biking with his wife; he personally describes himself as more of a hiker than a biker. Rumours notwithstanding, the numbering was "not" inspired by a wayfinding system from the mines, nor by the London Underground. Bollen said in a 2017 interview that the choice was straight logic: he needed to label each intersection, and using town names would have caused chaos, and there weren't enough letters in the alphabet, so he used numbers. He wanted something short; he felt it was important that the signage not contain too much information.
Initially Tourism Limburg did not have much faith in the scheme, saying that Limburgers didn't want to bike by numbers, but they came to support it. The first signage was installed in 1995, and the network has grown rapidly since. RLKM estimates that the network brings 16.5 million euros of revenue to Kempen (Campine) in Maarsland annually. Bollen has said he was surprised by the system's success.
The Flemish Prize for Merit in Sports was awarded to the system in 2009. The system won the Paul Mijksenaar Award for functional design in 2013.
Areas.
The system was first introduced in the Netherlands in 1999, and by 2014, the entire Netherlands was part to the network. It was first introduced to Germany in 2001, and is being extended in multiple regions, including near the borders, in the Ruhrgebiet, Lower Rhine region, Sauerland and Siegerland ().
The system is displacing more traditional national cycling route network signage: long, named routes, each individually signposted. In 2017-2021, the Netherlands reduced its LF-routes, amalgamating some of them. The ways themselves remained part of the numbered-node network. Belgium also reduced its named routes in 2012.
Numbering.
In the Netherlands, one- and two-digit numbers are used. Nodes with the same number are placed far apart. Signs also name the network section and say which local authority maintains the network.
Belgium uses two- and three-digit numbers, and they are assigned by the local maintaining organization instead of a central network organization. It is thus very rarely the case that two nearby nodes will have the same number. Unlike the Netherlands', the Belgian numbered-node network excludes urban areas.
In Germany, there is a one- to two-digit system; as in the Netherlands, it is organized at the national level (by the FGSV), but signs are usually implemented by local tourist boards. 
Use.
Paper numbered-node-network maps can be bought at tourist offices, and some hotels, and restaurants; paper-format maps are also available online. There are also many online route planners. OpenStreetMap, a Wikipedia-style map, has extensive information on the numbered-node network, available as downloadable maps and datasets under the Open Database License.
Cyclists sometimes print the lists of node numbers and fasten them to their handlebars or front mudguard. They can thus refer to them and pick the right path without having to memorize numbers or stop.
Paper, downloaded or roadside maps simplify changing route when plans, weather, etc. change.
As with rest areas alongside car routes, bike numbered-node networks are designed and upgraded for access to roadside services, such as public toilets, accommodation, food and drink. This encourages tourism and is seen as a form of local economic development. These facilities are also mapped in some areas.
The routes are not entirely on dedicated cycleways; some parts are on quiet roads. The routes are selected for being pleasant to cycle, and thus may not always be the shortest and fastest routes. While there is no formal international standard which routes must meet, routes are tested before they are added to the network, and there's an expectation that they will be more-or-less to Dutch standards for cycle routes.
Road signs.
Road signs vary depending on jurisdiction. At nodes, "node sign"s give the direction of the adjacent nodes, and between nodes, the "internode sign"s show cyclists heading for the next node which direction to go, reassuring them that they are on the right track (see images). Signs are bidirectional. Signage also includes maps at a variety of scales. Internode distances are given.
The Netherlands and Belgium have signs set at or below cyclist eye-level, with minimal, large, text (readable without slowing down). 
In Germany, standard signage is set high on poles. German nodes are usually marked by a large red "Node-point-hat" ("Knotenpunkthut") sign on top of the pole, visible from a distance; just below, the directions of adjacent nodes are indicated in the wordier format of traditional pedestrian arrow signage (see images below). Most nodes in Germany have wayside-map signs at eye level. The system has been described as ideal for those with no sense of direction.
German node signage is usually white-on-red. 