The shared road messages ride — one line many voices write to and read from, in order.
Clipped from omnibus, the dative plural of Latin omnis (all) — 'for all' — the name given to the horse-drawn public carriage of the 1820s-30s, later shortened to the single syllable that survives.
The shared road messages travel on — one line that many voices write to and read from, each in its turn.