Glory to Rome
Does a Bridge still do anything in a two- or three-player game?
The rulebook's Bridge section ties only the all-opponents reach to four or five players; its other effects have no player-count limit.
- Glory to Rome rulebook · Rulebook · Bridge
Yes. The wider reach to every opponent only adds something in four- or five-player games, since with fewer players you already demand from everyone. The Bridge still gets past Palisades and still takes a matching Material from each opponent's Stockpile; Walls still block it.