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Klia aerotrain dated 060615.jpg
OwnerMalaysia Airports Holdings Berhad
LocaleKuala Lumpur International Airport, Malaysia
TypePeople mover
Operator(s)Engineering Transportation, Malaysia Airport (Sepang) Sdn. Bhd.
Rolling stock3 × 3-car Adtranz/Bombardier CX-100
Track length1.2 km (0.75 mi)
CharacterServes sterile parts of the airport
Electrification600 V 50 Hz 3-phase AC third rail
Operating speedMaximum speed 56 km/h (35 mph), Minimum speed 47 km/h (29 mph)
Route map

Terminal A
Main Terminal
Operations, Maintenance
and Storage Facility
Terminal B
under construction

The Aerotrain is an automated people mover (APM) system located within the Kuala Lumpur International Airport in Malaysia.[1]

Opened in 1998 along with the airport, the Aerotrain system consists of two stations, one in the Main Terminal Building and the other in Satellite Building A. The system is the only means of transport for passengers between the two terminals.

Upgrading works on the Aerotrain had caused the service to be suspended between 1 November 2010 and 15 March 2011. Passengers were transferred between the Main Terminal Building and the Satellite Building by bus shuttles during the upgrading period.[2]

General information

The Aerotrain is fully automated and driverless. Usually, two trains ply between the two stations. In accordance with the Spanish solution, when the train reaches the platform, the exit doors will open first for passengers to disembark, after which the entrance door on the other side will open.

Part of the train track goes underground to cross the taxiway.[3] The ride between the Main Terminal Building and Satellite Terminal A takes about 2.5 minutes.[4]

The Aerotrain supported various operating modes such as Synchronized Double Shuttle Mode, Offset synchronized Double Shuttle Mode, Unsynchronized Double Shuttle Mode, Single Shuttle Mode, On-Call Mode, Test Train Mode and Out Of Service Mode. The Aerotrain has 4 major sub-systems, namely the Central Control System, Vehicle System, Station Automatic Train Operation (ATO) System and Power Distribution System (PDS). The trains have an operating speed of 56 km/h (35 mph) with a 3-phase AC 600V power supply at 50 Hz. A 75 kW (101 hp) DC electric motor (model number: 1460-P4, controlled by a thyristor drive) constitutes the propulsion system of the trains.

The maintenance of the Aerotrain is scheduled at 10am-12pm and 12am-5am everyday, when only one of the trains will be running for operation and the other one will undergo maintenance works and safety checks. The frequency of the train decreases from every 212 minutes to every 5 minutes during the maintenance periods.

The Aerotrain heading towards the Main Terminal Building. One can see that the tracks go under the taxiway.
The Aerotrain heading towards the Main Terminal Building. One can see that the tracks go under the taxiway.

Rolling stock

The rolling stock is manufactured by Adtranz (merged with Bombardier Transportation in 2001) and comprises 3 CX-100 trains with 3 cars per train (originally 2 cars), of which each car has a capacity of 249.[5]

On 15 March 2011, a new train was added to the fleet which is known as Train 3. The addition is made to cover the shortfall of the Aerotrain system when either Train 1 or Train 2 is scheduled for an overhaul programme. The overhaul programme is necessary as both Train 1 and Train 2 has been in use for 13 years.

In December 2021, a local engineering firm, Pestech International Bhd has secured the Kuala Lumpur International Airport (KLIA) Aerotrain project for RM742.95 million, which involves the upgrade of the 1.2 km automated people mover (APM) system at the airport, together with the Aerotrain's operations and maintenance, for a 10-year period from 2025 to 2034. The package include an upgrading from the current Bombardier's Innovia APM 100 rolling stock to the Innovia APM 300.[6]


On 25 December 2017, one of the trains broke down in between the two terminals and a detrainment was carried out.[7] This left the aerotrain running on a single train and free shuttle buses were provided.


See also


  1. ^ "Appendices" (PDF). United Nations Economic and Social Commission for Asia and the Pacific. Archived (PDF) from the original on 2020-06-11. Retrieved June 11, 2020.
  2. ^ Temporary Closure of Aerotrain Service at KLIA to allow upgrading of Facility
  3. ^ "Fracture Toughness of Railway Track Material Using Finite Element Analysis" (PDF). 2010. Archived (PDF) from the original on 2020-06-11.
  4. ^ "KLIA layout plan, guide on getting around the Kuala Lumpur International Airport". KLIA2. Retrieved 2020-06-11.((cite web)): CS1 maint: url-status (link)
  5. ^ "KLIA Aerotrain Upgrade". Archived from the original on 27 September 2007.
  6. ^ "Pestech to finance, upgrade and operate KLIA Aerotrain project for RM743m". 28 December 2021.
  7. ^ Shahar, Fairuz Mohd (2017-12-25). "One KLIA aerotrain resumes service, the other still undergoing maintenance". NST Online. Archived from the original on 2020-06-11. Retrieved 2020-06-11.