Byways open to all traffic

In the United Kingdom, a byway open to all traffic (BOAT) is a highway over which the public have a right of way for vehicular and all other kinds of traffic but which is used by the public mainly for the purpose for which footpaths and bridleways are used.

In rural areas such roads can often be unmetalled – when they are known as green lanes. Such roads are lawful highways open to all traffic, although they often have the appearance of being no more than glorified tracks.