|designation = byway_open_to_all_traffic|
|A legal classification of a highway on which the public have a right to travel on foot, horseback, and in a vehicle (including mechanically propelled)|
|Used on these elements|
|Status: in use|
|Tools for this tag|
- Main article: Access provisions in the United Kingdom
This tag is almost exclusively used in England and Wales to describe a type of public right of way, known as a byway open to all traffic (BOAT). A BOAT is a way along which unobstructed public access, via foot, horseback, and vehicle (including a mechanically propelled vehicle such as a motorcar) is legally enshrined by the UK's Countryside and Rights of Way Act 2000. A local authority may, however, prevent access to mechanically propelled vehicles on a BOAT through a Traffic Regulation Order under the Road Traffic Regulation Act 1984 entirely or under certain conditions. Additionally, although mechanically propelled vehicles may be permitted on a BOAT, the surface may not be suitable for normal vehicles. The route of the BOAT will be contained within a local authority's definite map and statement. Such ways may cross public or private land.
In the United Kingdom, this tag is to be used only for way legally designated as a byway open to all traffic, and should usually be accompanied by the following tags:
- prow_ref=* (if known)
The highway=* tag normally used is highway=track but other highway tags may be more suitable. See Further guidance on tagging Public Rights of Way in the United Kingdom for more information on this.