Analysis of information sources in references of the Wikipedia article "Road" in English language version.
Historically, a highway comprehended any path in which members of the public had the right to pass and re-pass without let or hindrance. The term embraced footpaths, bridleways, driftways and so forth. The advent of the motor vehicle and its peculiar requirements has seen increasing distinctions between paths over which walkers and riders have a right of way and those ways that are predominantly used by motor vehicles. The former may be usefully termed "rights of way" (and are the subject of a separate entry in this web) and the latter may be termed "highways."
Ways of the world Rutgers University Press, New Brunswick.
Most of the provisions apply on all roads throughout Great Britain, although there are some exceptions.
The land over which a public right of way exists is known as a highway; and although most highways have been made up into roads, and most easements of way exist over footpaths, the presence or absence of a made road has nothing to do with the distinction. There may be a highway over a footpath, while a well made road may be subject only to an easement of way, or may exist only for the landowner's benefit and be subject to no easement at all
"road" – (a) in England and Wales, means any length of highway or of any other road to which the public has access, and includes bridges over which a road passes, and (b) in Scotland, has the same meaning as in the Roads (Scotland) Act 1984
The land over which a public right of way exists is known as a highway; and although most highways have been made up into roads, and most easements of way exist over footpaths, the presence or absence of a made road has nothing to do with the distinction. There may be a highway over a footpath, while a well made road may be subject only to an easement of way, or may exist only for the landowner's benefit and be subject to no easement at all