Algiers suburban rail network

The Algiers suburban rail network (French: Réseau ferré de la banlieue d'Alger^[1]) is a commuter rail network serving the region of Algiers, the capital and largest city of Algeria. Operated by the Société Nationale des Transports Ferroviaires (SNTF), Algeria's national railway company, the network consists of seven lines and 212 kilometers (132 miles) of track serving 44 stations. The network serves a total of four provinces: Algiers, Blida, Boumerdès, and Tizi Ouzou, and carried 32.6 million passengers in 2018.^[1]

The origins of today's suburban network date back to the beginning of rail transport in Algeria, with the opening of the Algiers-Blida line (now part of the larger Algiers-Oran mainline) in 1862 marking the first section of the current network.^[3] Later, in 1879, the first section of the Algiers-Skikda mainline opened, thus forming the second part of the commuter network.^[3] Suburban services on both of these lines remained mostly unchanged throughout their history, with trains running from Algiers station to El Affroun on the Algiers-Oran line, and to Thénia on the Algiers-Skikda line.

Starting in the early 2000s, the SNTF launched a renewal program for the suburban network in order to bring it up to modern standards. This included the replacement of track on much of the network, as well as electrification and the delivery of new rolling stock.

In January 2004, tenders were launched for the electrification of the network,^[4] and the contract for the electrification was officially awarded to a consortium of Alstom, Infrarail, and Baticim in June 2004.^[5][6] Later, in 2005, tenders were also launched for the supply of 64 electric multiple-units for operation on the network,^[7] the winner of the contract being announced as Stadler Rail in March 2006.^[8][9]

The first train of the new fleet was rolled out in January 2008,^[10] and arrived in Algiers on May 31, 2008.^[6] In November 2008, the electrification of the Algiers-Thénia line was completed,^[11] and electrification works on the Algiers-El Affroun line were later also completed in April 2009,^[11] after which test running on the network began.^[2]

Electric services were officially inaugurated on both lines of the network on May 2, 2009, by then-president Abdelaziz Bouteflika, with regular services beginning the next day.^[11][2]

By the turn of the 2010s, the existing rail network had already been fully renewed, and so the SNTF began to expand the network to serve new areas of the Algerian capital.

Although electric services were inaugurated in 2009, diesel-hauled suburban trains were still running while the fleet of EMUs was still being delivered. By the end of 2010, however, the delivery of all 64 EMUs was completed.^[6][12] The last diesel locomotive-hauled suburban train, a Thénia-Algiers service, ran on December 30, 2010.^[13]

The first of the new lines was the Birtouta-Zéralda line, which branches off of the Algiers-El Affroun line to serve the northwestern districts of Algiers. Construction on the line began in September 2011,^[14] and the line opened on the 1st of November 2016,^[15] with regular services beginning later on December 11, 2016.^[16][17]

In 2008, a project to renew the Thénia-Tizi Ouzou line was started.^[18] The line, which had existed since 1886, was operated primarily as a regional railway, however the renovation works integrated the line into the electrified commuter rail system. Additionally, a 14 km (8.6 mi) extension of the line to Oued Aïssi was also included with the project.^[19] Electrified services on the newly renovated line were inaugurated on April 19, 2017, from Thénia to Tizi Ouzou, with the extension to Oued Aïssi later opening on June 6, 2017.^[20]

Construction of the network's newest branch, running from Bab Ezzouar to Houari Boumédiène International Airport, began in December 2012.^[21] The line opened on April 29, 2019.^[22][23]

On July 6, 2024, service began on the Oued Smar-Gué de Constantine line, enabling trains to run directly from both sides of the network and bypassing the core section in central Algiers.^[24] Upon the introduction of the service, trains ran from Réghaïa to both Blida and Zéralda, however in October 2024 trains were reconfigured to run from Thénia to El Affroun and Zéralda.^[25]

As of 2025, the commuter rail network is composed of seven lines and 212 kilometers of track, serving 44 stations. Most lines of the network start from either Algiers or Agha in central Algiers and radiate outwards, with a 10.5 kilometer long central section from Agha to El Harrach forming the core section of the network. From El Harrach, the two main lines of the network run to El Affroun in the southwest and Thénia in the east, with branches, such as the Zéralda or Airport lines, running off of them.

Although most lines of the network run on the core section, there are three exceptions to this rule: Thénia-Oued Aïssi trains on the Agha/Thénia-Oued Aïssi line, and trains running via the Oued Smar-Gué de Constantine line.

The Algiers-El Affroun line, also known as Algiers West or the Western Suburban (French: Banlieue Ouest),^[1] is the oldest line of the network. It runs from Algiers station in the city center southwest to El Affroun, in the province of Blida, over a distance of 68 kilometers,^[1] sharing track with the Algiers-Oran mainline throughout its entire route.

The Algiers-Thénia line, also known as Algiers East or Eastern Suburban (French: Banlieue Est),^[1] runs from Algiers main station to Thénia, in the province of Boumerdès on an east–west axis over 54 kilometers of track.^[1] Like the Algiers-El Affroun line, the Algiers-Thénia line runs entirely on existing infrastructure, in this case the Algiers-Skikda mainline.

The Agha-Zéralda line is a “U”-shaped line, which runs on Algiers-El Affroun line trackage from Agha to Birtouta, where it subsequently branches off of the line and runs north to Zéralda via the new town of Sidi Abdellah, with the entirety of the line being located within the boundaries of the province of Algiers. The line is 35 kilometers long, and was the first line in Algiers to be built and used exclusively for suburban rail traffic. Construction on the line started in September 2011,^[14] and the line was inaugurated on November 1, 2016,^[15] with passenger services starting on December 11, 2016.^[16][17]

The Agha/Thénia-Oued Aïssi line is the longest line of the network, running a total distance of 118 kilometers on an east–west route, connecting the provinces of Algiers, Boumerdès, and Tizi Ouzou. The line has its origins in the Thénia-Tizi Ouzou railway, which first opened in 1886, and was later upgraded and integrated into the suburban rail network. The line's renovated section opened on the 19th of April 2017, while the extension to Oued Aïssi opened on the 6th of June 2017.^[20]

Two types of trains run on the line: express services from Agha to Oued Aïssi, which skip certain stations on the Algiers-Thénia line, and local services running from Thénia to Oued Aïssi.

The Agha-Houari Boumédiène Airport line is the shortest line of the network, running for a distance of around 19 kilometers from Agha station to Algiers-Houari Boumédiène International Airport. Construction on the line started in December 2012,^[21] and it later opened on April 29, 2019.^[22][23] The line offers express service only, and runs on an east–west alignment. It also includes the network's only underground station, that being the terminus at the airport.

The Thénia-El Affroun line is one of the longest lines of the network, running for a total distance of around 105 kilometers on an east–west alignment, connecting the provinces of Blida, Algiers, and Boumerdès. The line is one of only two lines to use the Oued Smar-Gué de Constantine line, which bypasses the core section in Algiers in order to provide direct service between both sides of the network.^[24] Upon entering service on July 6, 2024, trains on the line originally ran from Blida to Réghaïa.^[24] However, in October 2024, a timetable change extended trains running on the line to run from Thénia to El Affroun, thus leading to the current line.^[25]

Like the Thénia-El Affroun line, the Thénia-Zéralda line uses the Oued Smar-Gué de Constantine line to bypass the core section of the network in central Algiers and run directly from one end of the network to another.^[24] However, instead of running on Algiers-El Affroun line trackage, the line instead turns north onto the Birtouta-Zéralda line. The line started operation on July 6, 2024,^[24] originally running from Réghaïa to Zéralda, and was extended to Thénia in October 2024.^[25]

As of 2025, there is only one type of rolling stock used on the network.^[12]

As part of the network's upgrading and electrification in the 2000s, the SNTF launched a tender for the supply of 64 electric multiple units for operation on the network in 2005.^[7] The winner of the tender was announced as the Swiss company Stadler Rail in March 2006,^[8][9] and delivery began in early 2008.^[10][6] Delivery lasted until 2010.^[12]

Based on Stadler's FLIRT design, the trains consist of four cars, with eight doors per side.^[26] They operate on the network's 25 kV 50 Hz AC overhead electrification system, and have a maximum capacity of 786 standing and 144 seated passengers.^[26] Up to four trainsets may be coupled together for a total capacity of around 3,700 passengers.^[12][26] The trains are classed by the SNTF as the Class 541, with series numbers 541–101 to 541-164.^[27]

Before the introduction of electric multiple-units on the network, passenger carriages hauled by diesel locomotives were used for suburban services.

In the early 1980s, the French manufacturer Francorail built several commuter carriages to be hauled by diesel locomotives for operation on the then-unelectrified network. These coaches included cab cars, which allowed trains to be driven from behind and thus resulted in shorter turnaround times. The locomotives hauling commuter trains, meanwhile, were generally borrowed from the mainline, regional, and freight operations of the SNTF, as there were no locomotives specially allocated for operation on the commuter network.

Locomotive-hauled trains started to be retired with the introduction of electric multiple-units in 2009, and the last locomotive-hauled service on the network, a Thénia-Algiers train, ran on December 30, 2010.^[13] Since their displacement in Algiers, most suburban coaches have been transferred to other cities in Algeria with diesel commuter rail, namely Oran, Constantine, and Annaba.

• A commuter train at Agha station in 1983.
• Agha station in 2006.
• Algiers station in 2007.
• Boumerdès station in 2014.
• Houari Boumédiène Airport station in 2025.