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Erfurt–Leipzig/Halle high-speed railway

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It is listed in Germany's Federal Transport Plan (Bundesverkehrswegeplan) as "German Unity Rail Project no 8.2" (Verkehrsprojekt Deutsche Einheit Schiene, VDE 8.2) and is a section of the Munich–Berlin high-speed route, part of the Line 1 of Trans-European Transport Networks (TEN-T) and on the east–west axis between Dresden and Frankfurt. To the north, it connects with the previously completed Berlin-Halle and Leipzig railways (VDE 8.3) and to in the south with the Nuremberg-Erfurt high-speed railway (VDE 8.1), which was opened in December 2017. The travel time from Munich to Berlin has been reduced to about four hours.

The design speed is largely 300 km/h (186 mph), reduced to 160 km/h (100 mph) on the branch to Halle. 15.4 km (9.6 mi) of the 123 km (76 mi)-long high-speed line is located in three tunnels; the six viaducts of the route together are more than 14.4 km (8.9 mi) long. With a length of approximately 6,465 metres (21,211 ft), the Saale-Elster Viaduct is the longest bridge structure in Germany and the longest bridge on a long-distance railway in Europe. The Unstrut Viaduct at 2,668 m (8,753 ft) is the second longest railway bridge in Germany.

Scheduled operations commenced on 13 December 2015. This shortened the journey times for ICE services over the 121 kilometres (75 mi) between Erfurt and Leipzig from 70 to 43 minutes and the 92 kilometres (57 mi) between Erfurt and Halle from 75 to 34 minutes.

The cost of the project was estimated in mid 2014 to be €2.967 billion.

Lines

Route

The line runs east from Erfurt Hauptbahnhof parallel with the Halle–Bebra railway. The two lines pass through the southern edge of Erfurt marshalling yard and past that Vieselbach freight distribution centre (Güterverkehrszentren), which lies to the south of the existing line in Azmannsdorf. West of Vieselbach the new line leaves the existing line and runs in a northeasterly direction. When passing through the Thuringian basin, it passes the towns of Großmölsen, Neumark, Krautheim and Buttstädt. Apart from the Scherkonde Viaduct (576.5 m (1,891 ft)) and the Gänsebach Viaduct (1,001 m (3,284 ft)), the line in this section has no major engineering structure. The Großbrembach overtaking loop lies between the two viaducts.

The line reached the Finne ridge in Herrengosserstedt and runs through the Finne Tunnel (6,965 m (22,851 ft)) between Rastenberg and Bad Bibra. After a short section that includes the Saubachtal overtaking loop the line passes over the Saubach Viaduct (248 m (814 ft)). This is immediately followed by the Bibra Tunnel (6,466 m (21,214 ft)), where the line passes below the Hermundurische Scholle plateau and comes to the surface again east of the Dissa valley. Northwest of Wetzendorf, the line crosses the valley of the Unstrut on the 2,668 m (8,753 ft)-long Unstrut Viaduct. It then passes through the Osterberg Tunnel (2,082 m (6,831 ft)), which ends at Kalzendorf, and the Jüdendorf overtaking loop. It then runs across the plateau of the Querfurt Plate (Querfurter Platte), and no further major engineering structures are required on the line apart from the Stöbnitz Viaduct (297 m (974 ft)). In Bad Lauchstädt, it passes under autobahn 38 and reaches the Dörstewitz overtaking loop.

The Saale-Elster Viaduct crosses the floodplains of the Saale and White Elster over a length of 6,465 m (21,211 ft), starting in Schkopau. The building of the longest bridge in Germany through several protected areas was particularly complex due to the Habitats Directive (Council Directive 92/43/EEC), a bird sanctuary and a drinking water protection zone grade III, which together required numerous applications of administrative law. Another special feature of the infrastructure is the grade-separated junction with the link to Halle (Saale) via a 2,112 m (6,929 ft) long viaduct, with a viaduct for the track towards Halle passing under the main viaduct. The branch connects with the existing Halle–Bebra railway at Ammendorf/Beesen. Halle (Saale) Hauptbahnhof is connected to the new line over a link with a total length of 8.9 km (5.5 mi).

The line towards Leipzig adopts a course without major engineering structures. In Gröbers, it has a grade-separated crossing over the tracks of the Mitteldeutschland S-Bahn and the Magdeburg-Leipzig Railway and there are connections between these lines at Gröbers junction. Before reaching Leipzig/Halle Airport, which has two outside platforms, it passes over Autobahn 9 on a bridge near the Schkeuditz Cross interchange (Schkeuditzer Kreuz). The line runs next to Autobahn 14 for nearly 13 km (8.1 mi) (kilometres 290–303) before turning off the A14 to approach Leipzig Messe station. After another six kilometres of upgraded line (Ausbaustrecke), the line ends in Leipzig Hauptbahnhof.

Design parameters

The design speed is 300 km/h (186 mph) between Erfurt and Gröbers near Halle. Between Gröbers and Leipzig Messe, the line speed is 250 km/h (155 mph) and, between Leipzig Messe and Leipzig Hauptbahnhof, the line speed is 160 km/h (100 mph). To allow this, the course of the line was planned with a reduced minimum curve radius of 4,287 m (14,065 ft) and a normal minimum curve radius of 6,300 m (20,700 ft). The gradient of the new line is up to 1.25%.

As of 1995, the width of the track formation for planning purposes, depending on track curvature, was between 13.30 and 13.70 m (43 ft 8 in and 44 ft 11 in) and a distance between track centres was 4.70 m (15 ft 5 in). The latter was later reduced to 4.50 m (14 ft 9 in). The reduced minimum vertical curve radius was 22,500 m (14.0 mi) with a normal minimum vertical curve radius of 25,000 m (16 mi).

Following the planning stage of 1995, overtaking loops were provided at intervals of about 20 km (12 mi) and crossovers at intervals of about seven kilometres. With the adoption of the four planned overtaking loop facilities (Überholbahnhöfe), the proposed crossovers could be dispensed with. Ballastless track is used for the continuous main tracks. The crossovers that are incorporated in the overtaking loop facilities at Großbrembach, Jüdendorf and Dörstewitz are designed for operations at 130 km/h (81 mph) and the turnout speed to the passing tracks is 100 km/h (62 mph). Because of the confined situation between the Finne Tunnel and the Bibra Tunnel the maximum speed in the Saubachtal overtaking loop is only 100 km/h (62 mph).

The distances required between overtaking loops were determined in an operational scientific study and were calculated according to track information based on the forecast program of operations.

Engineering structures

The maximum height of embankments is 15 m (49 ft 3 in) and the maximum depth of cuttings is 20 m (65 ft 7 in) (DB guideline 836). Bridges and tunnels were provided where these values could not be complied with. Overall, 35 rail bridges and 39 road bridges were built in the course of the project. A special feature is the design of four major bridges as "semi-integral" bridges. The pier and superstructure are monolithically connected, but, in contrast to integral bridges, there are joints in the superstructure.

The three tunnels extend for a total distance of 15.4 km (9.6 mi). Because of the geological conditions, the planned mixed traffic and for safety reasons they were built as two tubes carrying a single track with track centres spaced by about 25 m (82 ft 0 in). Connecting tunnels were built between them as escape routes at a maximum distance of 500 m (1,600 ft). Structural measures against tunnel boom were built where required in the portal areas.

The six viaducts have a total length of 14.4 km (8.9 mi). Originally they were to be 11.3 km (7.0 mi) long. In 1994, five major bridges were planned with a length of around ten kilometres.

Technology

The line is subject to the Technical Specification for Interoperability as part of the trans-European high-speed railway network.

The line is controlled by electronic interlockings (Elektronische Stellwerke, ESTW) that are remotely controlled by the Leipzig operations centre. This is assisted by the Erfurt Neubaustrecke sub-centre (ESTW-UZ) for the line outside the Erfurt/Halle/Leipzig nodes and four branch offices (ESTW-A) built at the overtaking loops. After the planning stage in 1997, it was still intended to build eleven substations (ESTW-A).

The route is between Erfurt Hbf and Leipzig Messe is equipped with European Train Control System (ETCS). For the first time in Germany, ETCS Level 2 has been used without trackside signals and with no signal-based fallback. 1352 Eurobalises have been installed with special mountings for protection from impacts. The four ETCS control centres (two in Erfurt, one each in Halle and Neuwiederitzsch) are designed as "two out of three" computer systems to deal with malfunctions. In an ETCS failure, the trains continue to operate under the ETCS Staff Responsible mode. An integrated user interface has been developed for the operation of the electronic interlockings and ETCS control centres. As a fallback to ETCS, an intermittent train control system (Punktförmige Zugbeeinflussung) was modelled, which would allow operations outside of stations with turnouts at speeds of up 160 km/h (100 mph). Procedures were also developed for dealing with a malfunctioning GSM-R Base transceiver station, so that trains can be run through.

The line was first put into operation with ETCS version SRS 2.3.0d (with additional changes), and it was initially scheduled to be upgraded to full functionality under ETCS Baseline 3 at the end of 2017. Therefore, only specifically approved vehicles (such as the ICE T and some railway service vehicles) may operate on this route. The upgrade program has changed and, instead, further developments are to be carried out on the basis of baseline 2. A full installation of ETCS at the Erfurt, Halle and Leipzig junctions was tested, and ultimately the Erfurt junction was partially equipped with ETCS.

15 GSM-R base stations were built along the line at intervals of six to eight kilometres comprising new and adapted existing base stations. In addition radio field amplifiers were built.

The new line is built as slab track with the overtaking tracks and connections with the existing network built as conventional ballasted tracks. 34,000 sections of slab tracks were laid for the line. In the tunnels and on the Saale-Elster Viaduct this is designed to be usable by emergency road vehicles. These new designs were tested on a specially built test track. Trains must be equipped with emergency brakes between Großbrembach and Jüdendorf.

Three new substations for the supply of traction power were built near Bachstedt, in the Saubach valley area and near Dörstewitz. Further, railway power lines with a length of 93 km (58 mi) were built (according to another source, 85 km (53 mi)). Originally four substations and 85 km (53 mi) of railway power line were planned. The Weimar substation was upgraded.

The new line was equipped with catenary of class Re 330 between early 2011 and the end of September 2014. Around 3,000 overhead masts were required for this. The section completed in 2003 between Leipzig Messe and Gröbers was built with class SICAT 1.0 catenary.

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