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The A3 is a
motorway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms i ...
in northeast
Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...
, running diagonally from France toward the southeast border, and passing by
Zürich Zürich () is the list of cities in Switzerland, largest city in Switzerland and the capital of the canton of Zürich. It is located in north-central Switzerland, at the northwestern tip of Lake Zürich. As of January 2020, the municipality has 43 ...
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 , french: link=no, Bâlois(e), it, Basilese , neighboring_municipalities= Allschwil (BL), Hégenheim (FR-68), Binningen (BL), Birsfelden (BL), Bottmingen (BL), Huningue (FR-68), Münchenstein (BL), Muttenz (BL), Reinach (BL), Riehen (BS), ...
, 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 Urdorf is a municipality in the district of Dietikon in the canton of Zürich in Switzerland, located in the Limmat Valley (German: ''Limmattal''). Geography Urdorf has an area of . Of this area, 32.2% is used for agricultural purposes, whil ...
and the
Uetliberg __NOTOC__ The Uetliberg (also known as Üetliberg) is a mountain in the Swiss plateau, part of the Albis chain, rising to . The mountain offers a panoramic view of the entire city of Zürich (to the northeast of its summit) and the Lake of Zu ...
Tunnel which was opened on May 4, 2009. After
Zürich Zürich () is the list of cities in Switzerland, largest city in Switzerland and the capital of the canton of Zürich. It is located in north-central Switzerland, at the northwestern tip of Lake Zürich. As of January 2020, the municipality has 43 ...
the motorway weaves through the hills of the south-east bank of Lake Zürich. It continues along the
Walensee The Walensee, also known as ''Lake Walen'' or ''Lake Walenstadt'' from Walenstadt, is one of the larger lakes in Switzerland, with about two thirds of its area in the Canton of St. Gallen and about one third in the Canton of Glarus. Other towns an ...
(Walen Lake), and on to
Mels Mels is a municipality in the ''Wahlkreis'' (constituency) of Sarganserland in the Seeztal, canton of St. Gallen, Switzerland. History Mels is first mentioned in 765 as ''Maile'' though this comes from a later copy of the original document. ...
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 , french: link=no, Bâlois(e), it, Basilese , neighboring_municipalities= Allschwil (BL), Hégenheim (FR-68), Binningen (BL), Birsfelden (BL), Bottmingen (BL), Huningue (FR-68), Münchenstein (BL), Muttenz (BL), Reinach (BL), Riehen (BS), ...
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
Autobahn The (; German plural ) is the federal controlled-access highway system in Germany. The official German term is (abbreviated ''BAB''), which translates as 'federal motorway'. The literal meaning of the word is 'Federal Auto(mobile) Track'. ...
ast 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 Wiedikon - Zürich south, the so-called Sihlhochstrasse is referred to as the new A3W (feeder Wiedikon). Also initiated, with the opening of the Western Bypass, the first stage of the flanking measures pass the residential areas along the former "West tangent" in the city of Zürich. The existing road trains, which were used for urban transit highway connection endpoints and Wiedikon Hardturm, were temporarily contracted on May 2, each for one traffic lane in each direction. In the following months until the summer of 2010, Accompanying Measures for the Western Bypass of Zürich
", City of Zürich, TED.
dismantling will continue of the "temporary" transit routes to district roads (West Street and Sihlfeldstrasse) and urban main roads (Seebahnstrasse und Schimmelstrasse)). In addition to various structural measures that are placed on the axis of incidence via Wollishofen and Albisrieden, additional traffic lights are used to regulate traffic flow in the metering equipment and make the side-traffic into the residential neighborhoods unattractive.


Junction list


Notes


References


Westumfahrung
(Website of canton of Zurich)
Photos: A3 on Autobahnen.ch

Photos: A3W on Autobahnen.ch






* More sources in " Motorways of Switzerland". : '' from the German Wikipedia.'' {{Motorways of Switzerland A03