I would have thought it was.
Right of way is a phrase commonly used and correctly so under Common Law as opposed to Statute Law pertaining to Right of Way across another's land.
Quote:
right of way
noun, plural rights of way, right of ways.
1.a common law or statutory right granted to a vehicle, as an airplane or boat, to proceed ahead of another.
2.a path or route that may lawfully be used.
3.a right of passage, as over another's land.
4.the strip of land acquired for use by a railroad for tracks.
5.land covered by a public road.
End quote
...but referred to as taking "priority" in the highway code (Approved Code of Practice) which is not law but has quasi-legal status and is referred to when a prosecution is taking place under The Traffic Act
How's about that for pedantic!