Brussels Regional Express Network

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Brussels RER/GEN
NMBS S-Trein logo.svg
12-05-2016 - NMBS 945 - S5 3583 - Beersel.jpg
Owner Infrabel
Locale Brussels, Belgium
Transit type S-Bahn
Number of lines 12
Line number S1, S2, S3, S4, S5, S6, S7, S8, S81, S9, S10, S20
Number of stations 120
Annual ridership 25,000,000 (projected)[1]
Operation will start 13th of December 2015
Operator(s) National Railway Company of Belgium
Number of vehicles Desiro ML AM08 (Siemens Desiro ML) 305
Headway 15 minutes
System length 350 km (217 mi)
Track gauge 1,435 mm (4 ft 8 12 in) (standard gauge)
Electrification 3kV DC overhead supply
Top speed 160 km/h (99 mph)
Network map

Map of the RER Bruxelles - GEN Brussels.png

The Brussels Regional Express Network (French: Réseau Express Régional Bruxellois or RER); (Dutch: Gewestelijk ExpresNet or GEN) is a rapid transit system under construction in Belgium. It will offer fast connections and increased frequency within a 30 km radius of Brussels, covering a territory inhabited by 2.5 million people.[2]


Most jobs in the Brussels-Capital Region are filled by workers from other regions. Private vehicles clog the city daily, hampering mobility and creating pollution. The RER/GEN is a response to these growing problems. Only 20% of commuters use public transport daily; the goal is to double this by facilitating movement into and within the city.

Total costs for the GEN/RER project will be at least €2.173bn.[3] There will be nine lines,[4] with departures at least every 15 minutes.[5]


A first draft of the RER/GEN network was published in 1995. The commissioning of the first lines was then planned for 2002.

Construction requires the approval and funding from the federal government and the three regions as well as the collaboration of four public transit companies (NMBS/SNCB, MIVB/STIB, De Lijn and TEC). The initial work started in 2005, and service was supposed to start in 2012. However, Belgium's administrative complexity caused numerous delays and postponements; the network will now be put into service between 2015 and 2025.[6]


Railway lines within a 30 km radius of Brussels are included in the project.[7] Parts of the project are already in place. The most substantial works relate to the quad-tracking of several lines: two tracks for GEN/RER trains, and two tracks for intercity and high-speed trains.[8]

The RER/GEN project includes a 1.25 km double-tracked Schuman-Josaphat tunnel in the north east of the city. This links the European Quarter to Brussels Airport, cutting journey times between the two to 13 minutes.[5]

Most of the network uses existing rail lines. Increased frequencies and passengers, however, requires in addition to the Schuman-Josaphat tunnel, other significant infrastructure projects:

  • Quad-tracking of sections in order to segregate local and regional traffic from faster inter-city trains
  • Demolition and reconstruction of several bridges that cross the wider track
  • Construction of additional breakpoints
  • Installation of noise barriers
  • Redevelopment of 28 existing stations in Brussels
  • Creation of transfer points
  • Construction of park-and-ride lots

Rolling stock[edit]

NMBS/SNCB has ordered 305 Siemens Desiro ML single-deck electric multiple units,[9] a €1.425bn contract. These will have a 2MW power rating and a capacity of 280. The deal represents a break from NMBS/SNCB sourcing its stock from Bombardier, with construction announced as being at Siemens' plant in Krefeld-Uerdingen,[10] Germany.[5]


According to the NMBS/SNCB website, the GEN/RER will have nine lines.[11] Their website currently shows a network plan foreseen for 2012.[12] The map numbers eight lines, while a ninth line (Wavre - Villers-la-Ville) is depicted but not included in the map legend.

Line Route Stops
1 Zottegem / Geraardsbergen ↔ Brussels ↔ Arenberg 37
2 Nivelles ↔ Brussels ↔ Louvain-La-Neuve 31
3 Braine-l'Alleud ↔ Brussels ↔ Brussels AirportLeuven 19
4 GeraardsbergenHalle ↔ Brussels ↔ Mechelen 33
5 LaekenAalst 18
6 Braine-le-Comte ↔ Brussels ↔ Dendermonde 23
7 Halle ↔ Brussels ↔ Vilvoorde 16
8 Aalst ↔ Brussels ↔ Louvain-La-Neuve 18
9 Villers-la-VilleOttigniesWavre 9

2009 plan[edit]

A study conducted by Significance, Stratec, Tractebel and Tritel for the FPS Mobility and Transport in 2008-2009 presented its vision for the GEN/RER in the longer term.[13]

The plan envisages a direct link between Ottignies and Leuven in 2015, with a service between Dendermonde and Mechelen and a connection to Gosselies airport (Brussels South Charleroi Airport) in 2020. Further possibilities for expansion are proposed for 2030.[14]

2015 plan[edit]

A plan was presented by the head of Belgian Railways in March 2015 to start operations on 13 December 2015.[citation needed]

The initial network comprises 12 lines (from S1 to S20, see below). A pdf map of the network valid from December can be found here.

Due to a delay of the works (because of the Brussels lockdown) on the Schuman-Josaphat Tunnel, the lines S5 and S9 have an amended journey until April 2016.[15] Full details in an updated pdf map can be found here

The complete network should be completed by 2025.

Line Route Stops Frequency
S1 Nivelles-NSC-Mechelen 22 2x/h
S2 Braine-le-Comte-NSC-Leuven 22 2x/h
S3 Zottegem-NSC-Dendermonde 23 1x/h
S4 Aalst-Etterbeek-Merode-Vilvoorde 21 Peak
S5 Geraardsbergen-Schuman-Josaphat tunnel-Mechelen 25 2x/h (Halle-Mechelen)
1/h (Geraardsbergen-Halle)
S6 Schaarbeek-NSC-Geraardsbergen-Denderleeuw 21 1x/h
S7 Halle-Merode-Mechelen 18 1x/h
S8 Louvain-la-Neuve-NSC-Brussels-South 16 1x/h
S81 Ottignies-Schaarbeek 10 1x/h
S9 Braine-l'Alleud-Schuman-Josaphat tunnel-Leuven 19 1xh Peak
S10 Aalst-NSC-Brussels West-Dendermonde 28 1x/h
S20 Ottignies-Leuven 13 2x/h

See also[edit]

External links[edit]