From Longman Dictionary of Contemporary Englishwaysideway‧side /ˈweɪsaɪd/ noun [countable] literaryALTTR the side of a road → fall by the wayside at fall1(16)
Examples from the Corpus
wayside• For all his bold chivalry this watchful Celt seems surely to have strayed from a wayside pulpit.• Once there was a wayside inn, now a pathetic ruin.• The train stopped at some wayside station.• Specific and lengthy training - usually over a period of years so the non-committed will fall by the wayside. 3.• And what of those that have already fallen by the wayside?• Several would-be robot makers fell by the wayside, among them Remek of Milton Keynes.• Near a tombstone-memorial by the wayside, I gazed on a crowd of boys.• A row of candles stood by the wayside. 