Every clock at the Airport Rail Link tells the same time because all are set via satellite according to GMT (Greenwich Mean Time) in order to ensure that every system is in accordance with international standard. The main clock system will receive time setting from 8 satellites, which will then be sent to the antenna. The main clock system will then send information to various sub-clocks in 8 stations, and then the sub-clock will send information to each individual clock at the station. The benefit of this is that the main clock will set accurate time for every clock in the same system. System that gives accurate time in the station is beneficial for passengers such as baggage handling system, which enable to immediately give time information of the lost baggage. Closed circuit camera is also able to check the time anyone enter and exit the facility. If we have accurate time, chronological event of the incident can be accurately investigated. Ticket distribution system is linked with time system, which enables to indicate number of ticket sold at that particular time. Number of ticket sold is linked with train schedule. Flight Information Display is another system that is important for Airport Rail Link passengers. City Air Terminal is installed with monitors displaying flight information directly sent from Suvarnabhumi Airport to allow passengers to check departure time and plan their own travel time accurately so they will not miss their flights.

Airport Rail Link provides train service at the maximum speed of 160 kilometer per hour on an elevated track parallel to the eastern railway, which covers the distance of approximately 28 kilometers, passing through 8 stations; Phyathai Station, Rajprarop Station, Makkasan Station and City Air Terminal, Ramkhamhaeng Station, Hua Mark Station, Thab Chang Station, Lad Krabang Station, and Suvarnabhumi Station. Passengers who wish to travel to Suvarnabhumi Airport have two options of service: 1. SA Express, a train service that transports passenger from City Air Terminal or Makkasan Station to Suvarnabhumi Airport within 15 minutes without stopping at any station along the way. 2. City Line, a train service that transports passengers between Phyathai Station and Suvarnabhumi Airport within 30 minutes and stops at every station long the way.

The loud slam of the train doors may lead to misunderstand that they are malfunctioning. In fact, this is just a normal operating system in ways that the sliding plug doors are slowly pulled inward the train until their ends meet closely and are automatically locked with pneumatic power system. The pneumatic power system enables the train to have a low compressed air coefficient of resistivity and to reduce air resistance whilst running at high speed. This is to make sure of passenger’s safety when getting on board the train. However, there is a question on why SA Express Line makes less noise than that of SA City Line or commuter trains. This is due to the fact that the saloon in SA Express Line is fully equipped with passenger seats that are wrapped up in cloth and carpet that would help in reducing noise as the doors slam shut with the violent force.

Since ARL system is designed to run with a maximum speed of 160 km/hr, it results in vibration that is felt on the train. Meanwhile, an occurrence of spark and noise over bogie No.2 of the train generated by a normal Overhead Catenary System (OCS) inducting the electricity to the train, but the system would not cause any danger to passenger. Therefore, the system is not suitable for the third rail that is parallel to the track, which possibly causes some serious damages and accidents. For this reason, OCS is a prime consideration for ARL system when compared with other systems. In consideration of the overhead power supply, or so-called Overhead Catenary System (OCS), the system is suitable for the commuter train in terms of security and cost-savings in construction of the traction power supply. In case of spark and noise, it is electrically occurred for a split second when the train passes the Neutral Zone in consequence of current changing contact line from pantograph, a device that collects electric current from overhead lines while the train is running between Ramkhamhaeng and Hua Mark station. But the system does not cause any danger to passenger.

Airport Rail Link train is designed to have a larger gap than any other systems for a reason of its high speed running at a max of 160 km/hr. with the gap distance of 136 mm, it helps in preventing the train against the friction on the platform