sentences:  The route narrows to a two-lane undivided road and continues through a mix of residential, commercial, and industrial areas.US 1 Alternate reaches an at-grade railroad crossing with a component of the wye junction between CSX's Capital Subdivision line and its Alexandria Extension.A short distance past the crossing, the route enters a long bridge with a sweeping curve that crosses over the Capital Subdivision before the route reaches its northern terminus at US 1 (Baltimore Avenue) in downtown Hyattsville.