The final segment, linking the two section of the Queensway, was placed into service on October 28, 1966.

It is a segment of The Three Counties System, linking the Rift Pot system to the south with Notts Pot to the north.

The tunnel is then opened in phases: first with the segment linking Portland and Staunton, then the segment linking the Portland-Staunton exits to the Shoreside Vale exits.

The segment linking Staunton is unfinished but still accessible, as shown when Toni Cipriani is seen driving a van through the area to reach a nonoperational subway terminal beneath Fort Staunton.

The first leg of the extension, an east-west segment linking the city portion of Porter Road to Military Road in Niagara, was completed by mid-1929.

The segment linking the Takamatsu on-ramp and Nishi Shinjuku Junction in Shinjuku opened to traffic on December 22, 2007.

On the same date, an above-ground segment linking the tunnel to the Kumanochō Interchange in Itabashi and Toshima also opened.

The highway was first constructed some time between 1915 and 1937, with a segment linking Fort Simcoe to White Swan completed by 1937.

Its first segment, linking Turku to Karis, was commissioned in 1895, and work began the following year.

The second in the western part of city, a short segment linking two existing lines in order to create a direct connection between two districts.