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Bruchsal Rollenberg junction is a complex flying junction

Flying junction

A flying junction or flyover is a railway junction at which one or more diverging or converging tracks in a multiple-track route cross other tracks on the route by bridge to avoid conflict with other train movements. A more technical term is "grade-separated junction"...

 at the intersection of Mannheim–Stuttgart high-speed railway with the Heidelberg–Karlsruhe line and is located between Bruchsal

Bruchsal station

Bruchsal station is the centre of the rail transport in the city of Bruchsal in the German state of Baden-Württemberg.-History :The original station of the baroque town of Bruchsal opened on 10 April 1843 as part of the Karlsruhe–Heidelberg section of the old Baden main line, which eventually...

 and Ubstadt

Ubstadt-Weiher

Ubstadt-Weiher is a municipality in northern Karlsruhe district in Baden-Württemberg, Germany. It is located on Bertha Benz Memorial Route.The four villages that make up the municipality are : Ubstadt, Weiher, Zeutern, and Stettfeld. The area in between and around these villages is numbered with...

 in the German state of Baden-Württemberg

Baden-Württemberg

Baden-Württemberg is one of the 16 states of Germany. Baden-Württemberg is in the southwestern part of the country to the east of the Upper Rhine, and is the third largest in both area and population of Germany's sixteen states, with an area of and 10.7 million inhabitants...

.

The Ubstadt connecting curve branches off the line from Heidelberg

Heidelberg Hauptbahnhof

is the central station for Heidelberg. In 2005 it was used by 30,472 passengers daily and is one of the largest passenger stations in Baden-Wurttemberg. The main station entrance opened in 1955 in Willy-Brandt-Platz in the western district of Heidelberg, on the edge of the district. Diagonally...

 in the northwest at Ubstadt-Weiher junction. The Bruchsal connecting curve (Verbindungskurve Bruchsal) branches off the line from Bruchsal and Karlsruhe

Karlsruhe Hauptbahnhof

is the central railway station in the German city of Karlsruhe. The station is classified as one of the major Category 1 stations in Germany, due to its function as a hub connecting several railway lines with each other.- History :...

 in the southwest at Bruchsal Nord junction.

Location and route

Bruchsal Rollenberg junction (Deutsche Bahn abbreviation: RROL) is located at the north west portal of Rollenberg Tunnel and thus where the Upper Rhine Plain

Upper Rhine Plain

The Upper Rhine Plain, Rhine Rift Valley or Upper Rhine Graben is a major rift, straddling the border between France and Germany. It forms part of the European Cenozoic Rift System, which extends across central Europe...

 meets the Kraichgau

Kraichgau

The Kraichgau is a hilly region in Baden-Württemberg, southwestern Germany. It is bordered by the Odenwald and the Neckar to the North, the Black Forest to the South, and the Upper Rhine Plain to the West. To the east, its boundary is considered to be the Stromberg, the Hardt, and the...

 hills. The two-track high-speed line is connected to the three tracks of the Mannheim–Heidelberg–Karlsruhe line by the two tracks of the Ubstadt connecting curve from Mannheim

Mannheim Hauptbahnhof

is the central railway station of Mannheim in Germany. It is the second largest traffic hub in southwestern Germany after Stuttgart Hauptbahnhof, with 658 trains a day, including 238 long-distance trains. 100,000 passengers embark, disembark or transfer between trains at the station each day...

 and Heidelberg in the north and by the single-track of Bruchsal connecting curve from Karlsruhe in the south.

The two curves span an area of 50 hectares. In this area, there are parts of the now disused and sealed Bruchsal district landfill and the junction of the Bruchsal–Odenheim line

Katzbach Railway

The Katzbach Railway is a branch line in southwestern Germany from Bruchsal to Odenheim that opened in 1896, and was extended in 1900 to Hilsbach. In 1960 services between Tiefenbach and Hilsbach were withdrawn, in 1975 the section between Odenheim Ost and Tiefenbach followed and, in 1986, the...

 with the Karlsruhe–Heidelberg line and the landfill siding.

Ubstadt connecting curve

The two tracks of the Ubstadt connecting curve separate at the grade-separated Ubstadt-Weiher junction (abbreviation: RUWA) from the Heidelberg–Karlsruhe line and run to the southeast. Trains on the southern track from Heidelberg run above the high-speed line before conecting with the track of the high-speed line that is used by trains running to the southeast. The northern track, which is designed for operations at 150 km/h, is used for trains running to Heidelberg. Both tracks connect with the track of a high-speed line that is appropriate to their direction of operation at the grade-separated Rollenberg junction.

The connecting curve also passes above the Bruchsal–Odenheim line, Federal Highway B 3

Bundesstraße

Bundesstraße , abbreviated B, is the denotation for German and Austrian national highways.-Germany:...

 and district road 3585.

About 950,000 cubic meters of material were used for the line’s embankment. It was extracted from the Rollenberg Tunnel and its approach cutting.

Bruchsal connecting curve

The single-track Bruchsal connecting curve runs from Bruchsal Nord junction (abbreviation: RBRR) northeast from the route from Karlsruhe and Bruchsal. South of the tracks of the high-speed line it connects with the southern track of the two tracks from Ubstadt curve.

The curve runs above the B 3 and crosses the tracks of the Bruchsal–Odenheim line at grade. It cuts the Bruchsal district landfill in half.

Bruchsal Rollenberg junction

At the northwest portal of the Rollenberg tunnels there are five tracks near the portal that join to form three tracks: the two tracks of high-speed line and the track lying to the south-west coming from Bruchsal and Heidelberg. Inside the tunnel the third track runs a short distance before connecting to the other tracks. This northwest portal of the Rollenberg Tunnel is the only railway tunnel portal in Germany with three tracks. With a cross section of 210 square metres, it is also has one of the largest cross-sections of tunnel portals on German high-speed lines.

Connecting curve Ubstadt

The Ubstadt connecting curve is passable at 160 km/h and was built between 1984 and 1988. It is up built on an embankment, which is up to 24 metres high and 180 metres wide, contianing 950,000 cubic metres of earth, won from the Rollenberg Tunnel and its approach cutting. Construction costs were about DM 39 million (1986 prices), equivalent to about € 20 million.

Connecting curve Bruchsal

The Bruchsal curve is single track, which is passable at 100 km/h curve, and was built after the Ubstadt curve. It was intended to serve regional and InterRegio

InterRegio

The InterRegio is a train service seen in some European countries. Mostly they are trains that run "from region to region", as best described by Swiss Federal Railways.-Switzerland:...

 traffic to and from the south-east. Another major purpose was the envisaged European high-speed link between Paris

Paris

Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...

, Strasbourg

Strasbourg

Strasbourg is the capital and principal city of the Alsace region in eastern France and is the official seat of the European Parliament. Located close to the border with Germany, it is the capital of the Bas-Rhin département. The city and the region of Alsace are historically German-speaking,...

, Munich

Munich

Munich The city's motto is "" . Before 2006, it was "Weltstadt mit Herz" . Its native name, , is derived from the Old High German Munichen, meaning "by the monks' place". The city's name derives from the monks of the Benedictine order who founded the city; hence the monk depicted on the city's coat...

 and Vienna

Vienna

Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...

 (the Magistrale for Europe

Magistrale for Europe

The Magistrale for Europe is a Trans-European Networks project for the creation of a high-speed railway line between Paris and Budapest. It TEN project No. 17 , and is already under way.....

).

After a 13-month planning inquiry completed in March 1988, the ground breaking ceremony for the curve was held on 30 September 1988.

A problem for its construction was that the it was necessary to prevent the Bruchsal district landfill from penetrating the surrounding groundwater; in addition about 65,000 m³ of waste had to be moved. Various solutions were considered and it was eventually decided to build on an embankment with minimal disruption of the landfill, using materials that were resistant to damage from the landfill and resistant to settling. The project was put tender in January 1989. It cost about DM 16 million (about € 8 million). Work began on 17 April 1989 and was completed on 31 July 1990.