Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
vĭālis, e, adj. [via], of or belonging to the highways or roads: Lares, placed, worshipped by the road-side, Plaut. Merc. 5, 2, 24; called also dii, Serv. ad Verg. A. 3, 148.