The Girsberg Tunnel is a motorway tunnel

Tunnel

A tunnel is an underground passageway, completely enclosed except for openings for egress, commonly at each end.A tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal. Some tunnels are aqueducts to supply water for consumption or for hydroelectric stations or are sewers...

 in Switzerland

Switzerland

Switzerland name of one of the Swiss cantons. ; ; ; or ), in its full name the Swiss Confederation , is a federal republic consisting of 26 cantons, with Bern as the seat of the federal authorities. The country is situated in Western Europe,Or Central Europe depending on the definition....

, and forms part of the A7

A7 (Switzerland)

The A7 is a motorway which runs from Winterthur in northeastern Switzerland through to Kreuzlingen, a border town with Konstanz ....

 motorway from Winterthur

Winterthur

Winterthur is a city in the canton of Zurich in northern Switzerland. It has the country's sixth largest population with an estimate of more than 100,000 people. In the local dialect and by its inhabitants, it is usually abbreviated to Winti...

 to Kreuzlingen

Kreuzlingen

Kreuzlingen is a municipality in the district of Kreuzlingen in the canton of Thurgau in north-eastern Switzerland. It is the seat of the district and is the second largest city of the canton, after Frauenfeld, with a population of over 18,000...

 and the border to Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

.

The tunnel is around 1.8 km long.

It lies in the northeastern part of the canton of Thurgau

Thurgau

Thurgau is a northeast canton of Switzerland. The population, , is . In 2007, there were a total of 47,390 who were resident foreigners. The capital is Frauenfeld.-History:...

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The tunnel essentially winds its way down a hill in a clockwise direction (heading into Kreuzlingen). Despite all this winding, there is no actual difficulty in driving through the tunnel.

The eastern end of the tunnel is less than half a kilometre away from the terminus of the toll

Toll road

A toll road is a privately or publicly built road for which a driver pays a toll for use. Structures for which tolls are charged include toll bridges and toll tunnels. Non-toll roads are financed using other sources of revenue, most typically fuel tax or general tax funds...

 portion of the A7 motorway, which takes the form of a rarely seen motorway roundabout

Roundabout

A roundabout is the name for a road junction in which traffic moves in one direction around a central island. The word dates from the early 20th century. Roundabouts are common in many countries around the world...

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