The A3 is a motorway in northeast Switzerland, running diagonally from France toward the southeast border, and passing by Zürich on the way. The total length of the A3 motorway spans roughly , but parts of the road share sections of the A1 and A2 motorways. The A3 belongs to the Swiss motorway network. It starts at the border in Basel, where it connects to French motorway A35. From the Wiese Motorway Fork, the route is shared with the A2. At Augst, the motorway splits, with the A2 branching off and the A3 continuing past Rheinfelden and Frick. After the Bözberg tunnel is the Birrfeld Motorway Fork, near Birmenstorf. Here, the A1 and A3 share the same route as far as Motorway Interchange Limmattal, where the A3 goes towards Urdorf and the Uetliberg Tunnel which was opened on May 4, 2009. After Zürich the motorway weaves through the hills of the south-east bank of Lake Zürich. It continues along the Walensee (Walen Lake), and on to Mels where it ends at a junction with the A13. The A3 represents (together with a section of the A1) the most important connection between Basel and Zürich, and (together with a section of the A13) the most important connection Zürich–Chur. Sections Weesen-Murg A special feature is the highway section at Lake Walen. Between Weesen and Murg in 1964, the N3 center was opened as a main road and led by the six tunnels: Ofenegg (), Weisswand (), Standenhorn (), Glattwand (), Mühlehorn (), and Stutz (). The highway section has been extended since 1986 with the opening of the Kerenzerberg Tunnel (), which handles the road to Murg / Sargans. The old six tunnels and the road on the shores of Lake Walen were converted to unidirectional operation and now form the carriageway to Weesen / Zürich. Zürich Western Bypass Since May 4, 2009, with the opening of the highway section between the port Birmensdorf and Zürich, the branch South- the last section of the so-called "Western Bypass" - the A3 motorway is continuous between Basel and Sargans. With the opening to traffic of the new section on May 4, two existing sections of highway have been renumbered. The leader in the city of Zürich Autobahnast Limmattal - Hardturm (always officially recorded as N1) is now known as A1 (Switzerland) or A1H (Shuttle Hardturm) rather than A3. The leading out of town Autobahnast