| international cycling map created from OSM data is available, provided by Andy Allan. The map rendering is still being improved, the data are updated every few days. It shows National Cycle Network cycle routes, other regional and local routes, and other cycling-specific features, such as:
|Waymarked Trails: Cycling by Sarah Hoffman is a layer superimposed over mapnik (Standard) which shows marked cycle routes around the world. Updated minutely, it renders actual routes without the state=proposed tag. Therefore no proposed routes (or proposed numbering protocols) are displayed.|
The National Byway is a signed, de facto leisure cycling route in the United Kingdom, mostly along quiet lanes and avoiding cities. It is currently 'under development': the route is scheduled[huh?] to open in summer 2010. At present (April 2011), there is no Internet mapping of the National Byway available, only an (as yet incomplete) set of paper maps. This is therefore a great opportunity for OpenStreetMap to provide such a map.
The ways which make up the National Byway should be tagged using relations. Do not tag the ways directly.
There is one or more route relation for each region of the National Byway, and a separate relation for each signed loop. The size of each relation is currently restricted by what can reasonably be worked with - initially the National Byway was created a a single relation for the UK, but that soon became too large to manage.
Each route relation should be tagged as:
|ref=NB||Will display as a route label on the CycleMap.|
|name=National Byway (region)||Include the name of the National Byway [region].|
The National Byway is keen on loops and circular rides, and in many instances these are signed in one direction only, generally anti-clockwise to reduce the number of right turns in the loop. It's difficult to follow signs backwards, so it is important for cyclists that the one-way sections of the National Byway are tagged correctly. Where the National Byway is signed in one direction only, the ways in the relation should be assigned a role of forward or backward as described in Relation:route#Members. The direction is rendered on the OpenCycleMap at zoom level 14 and greater.
Other optional tags are listed at Cycle routes#Relations.
An earlier proposal was to tag the National Byway as network=national_byway, in conjunction with specific rendering in the OpenCycleMap, which was never implemented. The current tagging as a set of regional cycle routes network=rcn is now preferred: see  et seq. for the rationale.
One can see the 'outline map' at the National Byway website: .
Sections that have been mapped already include:
|Description (organised by National Byway region)||Relation||Notes|
|Ayrshire, Argyll and Bute|
|East of England|
|Cambridgeshire: South of Cambridge||marked on the development diagram (on the N.B. site) as 'being signed'|
|the Rutland area||large sections have been completed, but certain locales need attending-to|
|County Durham and Northumberland|
|section around Kielder Forest|
|South-East and South-Central England|
| Oxfordshire and Glos—Northleach to Witney
Dornford Lane (near Woodstock) to Buckinghamshire border
| Several disconnected sections:
|the Solway Firth area|
|Shropshire||relation'd between Attingham Park and the southern outskirts of Whitchurch|
|Shropshire: Shrewsbury to Leominster, then… —|
|Herefordshire: …towards (and slightly beyond) Ledbury —|
|West Herefordshire: route to Wales||Link route and the Herefordshire section of the Radnor Ring|
|from Humber Bridge to the northern end of the Yorkshire region at Barnard Castle|
To tag National Byway loops, create a new relation with the tags as above, and use the name of the loop, e.g. name=National Byway (Oakham Loop); consult this page on the National Byway site for a list of loops. Remember that loops are usually signed in one direction only.
Loops that have already been fully/partially mapped are as follows:
|Loop (organised by National Byway region)||Relation||Notes|
|Newark / Southwell Loop|
|South-East and South-Central England|
|Bernwood Forest Loop|
|Charleton Horethorne(?) Loop|
|Tisbury Loop||Perhaps some signs have been removed or turned round? The route is difficult to follow.|
|Winchester (East) Loop||complete|
|Much Wenlock Loop|
|Church Stretton Loop|
|Holderness Loop||There is a break in the loop where the road has been washed over a cliff but it is passable on foot.|
|Ripon Loop||Ripon is poorly mapped.|