Bremgarten–Dietikon railway line
|Bremgarten–Dietikon railway line (S17)|
One of the, since sold, Be 4/8 units on the railway bridge in Bremgarten
|Termini||Wohlen, Aargau, Canton of Aargau
Dietikon, Canton of Zürich
|Opening||1876 (Wohlen–Bremgarten West)
1912 (Bremgarten West–Bremgarten)
|Line length||18.8 km (11.7 mi)|
|No. of tracks||Mixture of single and double track|
|Track gauge||Metre (3 ft 3 3⁄8 in)
Standard (1,435 mm (4 ft 8 1⁄2 in))
|Minimum radius||25 m (82 ft)|
|Electrification||1200 V DC overhead wire|
The Bremgarten–Dietikon railway line (German: Bremgarten-Dietikon-Bahn, BD) is a railway line in Switzerland. It connects Wohlen and Bremgarten in the canton of Aargau with Dietikon in the canton of Zürich. Passenger service on the line now forms part of the Zürich S-Bahn, branded as the S17, and a frequent service is provided, with trains running up to every 15 minutes.
The line was opened in stages, and under different ownership, between 1876 and 1912. Whilst the earliest section to be opened, between Wohlen and Bremgarten, was built as a traditional branch line, the later section between Bremgarten and Dietikon was built as rural electric tramway. Whilst much of the line has been upgraded, this is still apparent in the long stretches of roadside track, and stretches of street running in Dietikon.
Today the line is owned and operated by BDWM Transport AG, a company that also operates bus services in the region.
The route between Wohlen and Bremgarten West was built to standard gauge by the Aargauische Südbahn railway, which connected Aarau and Rotkreuz via Wohlen. The service began on September 1, 1876, operated by steam locomotives.
On January 1, 1902, the Swiss Federal Railways (SBB) took over the Aargauische Südbahn. The SBB continued to operate the service as a steam operated standard gauge branch line.
The line to Wohlen had several disadvantages for Bremgarten. The timetable was poor, Bremgarten West station was too far away from the town centre, and the connection to Zürich initially proceeded in the wrong direction and was very indirect. In 1895 a plan was produced for a roadside electric tramway across the Mutschellen pass between Bremgarten and Dietikon. As Dietikon already had a direct rail link to Zürich, this provided a much more direct connection.
Construction began in 1901, and the route was opened on April 30, 1902. The new line was owned by the Bremgarten-Dietikon-Bahn company (BD), and built to metre gauge. The line's headquarters and terminus were at Bremgarten station, close to the town's centre. Besides the connection to the main line railway at Dietikon, the line shared track in Dietikon with the Limmattal-Strassenbahn, which provided a link to the Zürich city tram system.
Wohlen-Dietikon through service
Despite the construction of the new line, there was still a gap of about a kilometre between Bremgarten and Bremgarten West where passengers had to make their own way. The BD entered into negotiations with the SBB, and in 1910, a permanent lease for the Wohlen-Bremgarten railway line was obtained.
The standard gauge line from Wohlen to Bremgarten West was converted to dual gauge (standard and metre) and was electrified. A new terminus was constructed opposite the main line station in Wohlen. In Bremgarten, a new stretch of metre gauge line was constructed to connect the two stations, including an imposing railway bridge across the river Reuss. Through running between Wohlen and Dietikon began on February 8, 1912.
After 1950 the line was modernised to suburban railway standards using new rolling stock and facilities. In 1969, the line took delivery of 9 new articulated BDe 8/8 units, which were to be the mainstay of the line for the next 40 years.
The opening of the rapid-transit Zürich S-Bahn network on May 27, 1990 caused major development. The route and timetable were integrated into the rapid-transit railway network, and three new stops with interchange facilities with other public transport modes were added.
In 1993, the line's rolling stock was augmented by 5 new Be 4/8 low-floor units. In 1995, a double-track section was built between Rudolfstetten Hofacker and Berikon-Widen, which was extended two years later to the Belveder stop.
In 2000, the BD company merged with the Wohlen-Meisterschwanden-Bahn company (WM) to form BDWM Transport AG, who still own and operate the line. Despite its name and by the time of the merger, the WM company was a bus operator, and BDWM Transport operates a number of bus services in addition to the Bremgarten–Dietikon line.
In 2010, the BDWM took delivery of the first of 14 new ABe 4/8 articulated low floor units, intended to replace all the previous units. The 40 year old BDe 8/8 units were, with the exception of the preservation of a single unit, scrapped. The 17-year-old Be 4/8 units were sold to the Wynental- und Suhrentalbahn.
The line begins in Wohlen at a platform opposite the SBB Wohlen station (altitude 426 m). After a few metres, the freight line joins; this produces a section of three-rail track (1,000 mm (3 ft 3 3⁄8 in) for passenger trains, 1,435 mm (4 ft 8 1⁄2 in) for freight trains). The line rises to 451 m altitude and passes into the Bremgarterwald (Bremgarten Forest). The Erdmannlistein stop lies in the middle in the forest and serves exclusively trip traffic. After 6.6 km is the Bremgarten West station (alt. 404 m), where the three-rail track for the standard-gauge freight trains ends.
Thus far the line is rather flat (maximum gradient of 1.5%), has gentle turning radii (minimum 300 m or 984 ft) and resembles a normal SBB standard gauge line. After Bremgarten West, the line changes its character completely. After two sharp curves the line runs along the 156 m long bridge over the Reuss. The company's headquarters, including a depot and administration building, are located at Bremgarten station (alt. 389 m).
From here on the line runs alongside the main road through a more densely populated, although still rural, area. A series of exceptionally tight U-shaped curves takes the line uphill, at slopes of up to 5.6%, to Berikon-Widen station on the Mutschellen pass at an altitude of 553 m (1,814 ft). From here the line drops through equally tortuous curves to Rudolfstetten Hofacker, where the downward gradient becomes gradually flatter. From Bergfrieden station the line has tramway-like characteristics with street-running. The line ends at Dietikon station (alt. 391 m) at a platform beside the SBB tracks.
The line is 18.8 km (11.7 mi) long, of which 1.6 km (1.0 mi) is double track and the rest single track. It has a minimum curve radius of 25 m (82 ft), and a maximum gradient of 5.6%. A section of 0.8 km (0.5 mi) length in Dietikon runs in the street, sharing its road space with other traffic.
The running line is equipped with metre gauge (1,000 mm (3 ft 3 3⁄8 in) gauge) track throughout, and is electrified at 1200 V DC, using an overhead line. This track is used by all passenger trains. A section of 6.6 km (4.1 mi) length, between Wohlen and Bremgarten West, is built to dual gauge standards, allowing freight trains running on standard gauge (1,435 mm (4 ft 8 1⁄2 in) gauge) track to reach the latter point.
The passenger services on the line now forms part of the Zürich S-Bahn, branded as the S17. A service of two trains per hour is provided every day between Wohlen and Dietikon. Except on Sundays and public holidays, an extra two trains per hour are provided between Bremgarten West and Dietikon. Apart from a small number of additional peak-hour express trains, all trains serve all stops, taking just over 30 minutes for the full length of the line.
The line uses the following rolling stock:
|7||BDe 8/8||1969||Articulated unit from the class of vehicles that operated the line for 40 years from the late 1960s. Built by Maschinenfabrik Oerlikon, this unit is preserved and used on special services. (Illustration is of a, since scrapped, unit of the same class).|
|10||BDe 4/4||1928||Bogie motor car, preserved and used on special services.|
|51-52||Tm 2/2||1967-68||Diesel shunters|
|5001–5014||ABe 4/8||2010-11||Articulated low floor units built by Stadler Rail, which now operate all regular passenger services.|
For many years there has been a plan for a tunnel between Bergfrieden and Dietikon, in order to avoid the tramway-like section. However, in times of limited funds such a project (its practicality being extremely questionable) is probably not realisable.
More realistic is the project for a light rail system in the densely populated Limmattal area, west of Zürich. Continuing from the BD line the first stage would lead from Dietikon to Spreitenbach and Killwangen. The second stage would be from Dietikon through Urdorf and Schlieren to Zürich-Altstetten railway station, with connection to the Zürich tram route 2 (Verkehrsbetriebe Zürich) at the Farbhof terminus.
- Eisenbahnatlas Schweiz. Verlag Schweers + Wall GmbH. 2012. p. 65. ISBN 978-3-89494-130-7.
- "Wohlen–Bremgarten–Dietikon" (PDF). Bundesamt für Verkehr. Retrieved 2014-04-28.
- "ZVV network plan" (PDF). ZVV. Retrieved 2014-04-30.
- "Unternehmen Wissenswertes und Stellenangebote" [Companies to know and Careers]. BWDM Transport. Retrieved 2014-04-30.
- Moglestue, Andrew (February 2010). "BDWM news". Retrieved 2014-05-20.
- Lambert, Anthony (2013). Switzerland Without A Car (5th ed.). Chalfont St. Peter: Bradt Travel Guides. p. 51. ISBN 978 1 84162 447 1.
- Zürcher Planungsgruppe Limmattal (German)