Complex sentence: Until 1984, PA 23 continued east along Conshohocken State Road across US 1 to Belmont Avenue, where it was then aligned with Belmont Avenue until its terminus at U.S. Route 30/Girard Avenue.
Split into simpler sentences: Until 1984, PA 23 continued east along Conshohocken State Road across US 1 to Belmont Avenue. Where it was then aligned with Belmont Avenue until its terminus at U.S. Route 30/Girard Avenue.