The Gubrist Tunnel is part of the Zurich northern bypass and runs northward along with the A4 as part of the A1, bypassing Zurich. With over 400,000 inhabitants, Zurich is the largest city in Switzerland and is located at the northern end of Lake Zurich. Zurich is the economic center of Switzerland, with the banking and financial services sector being its most important industry. Both UBS and Credit Suisse, along with other Swiss traditional banks, are headquartered in Zurich. As the largest city in Switzerland, located on the beautiful Lake Zurich, Zurich is also a popular tourist destination with a range of attractions. These include the historical old town of Zurich with the old town hall and guild houses, the Fraumünster Church, and the St. Peter's Church. Beautiful parks, Lake Zurich, museums, and theaters complete a visit to Zurich. Zurich is located in the northern part of Switzerland and is well-connected with the A1, A3, and A4 motorways, as well as additional expressways leading to Zurich.
Lake Zurich is a lake located south of Zurich, with a circumference of almost 90 km and a volume of nearly 4 km³. In the past, Lake Zurich played an important role in transporting goods by ship, serving as a significant economic factor. Nowadays, navigation on Lake Zurich is mainly of a tourist nature, while the transportation of goods has primarily shifted to roads and railways. The famous Orient Express used to pass by Lake Zurich, among other routes.
The A1 motorway, of which the Gubrist Tunnel is a part, is the longest motorway in Switzerland (410 km) and runs in an east-west direction through Switzerland from the Bardonnex border crossing with France to the Swiss-Austrian border near Höchst. The first section of the current A1 was opened in May 1962, and it has been continuously expanded and can now be driven without interruption since 2001. Since then, the A1 has been further expanded to improve traffic flow. This includes, for example, the expansion of the Gubrist Tunnel with an additional tunnel, which was completed in 2023.