The Acter Bridge is an unnamed and defunct bridge that crosses the canal which separates Tudor from the district of Acter Industrial Park. The bridge's name isn't mentioned in-game, however the bridge has a distinct presence in Liberty City.
It is a large steel-truss raising bridge that carries two roadways. It resembles the real-life raising Stillwater Bridge, and it appears that it used to raise like the Callahan Bridge did. It seems it was bypassed by the Plumber's Skyway. It most likely carried heavy traffic, since it is between two major industrial districts. It could have been abandoned for several reasons, 1) Bypassed; 2) Condemned; 3) No need to raise for boats; or 4) It was closed to provide land. The bridge could have also become structurally obsolete due to the fact that it carried only two lanes of traffic, so it was replaced with the larger Plumber's Skyway but was never torn down.
The bridge was probably shut down many years ago, as the road deck has plants growing out of it, the truss is rusted out, and it is heavily damaged. Its northern approach is gone, but the southern approach is still there. It used to connect to Trinity Road to the south and Tinderbox Avenue to the north. It was also probably part of an old major road which ran from Alderney City to AIP which got bypassed by the Plumber's Skyway; The said route runs north to south along Roebuck Road and turned onto Tinderbox Ave and crossed over onto the bridge's northern approach.