the world > animals > mammals > group Ungulata (hoofed) > family Equidae (general equines) > temperament > [adjective] > obedient or well-trained > trained for going on roads (2)
Of a horse: trained for being ridden on the roads. Cf. way, v. 2.
(originally) familiar with a road, route, or journey; expert in finding the right route; (later also in extended use, chiefly regional)…