12,856 KAI Rolling Stock on Standby, from Locomotives to Carriages Safeguarding Mobility and Supply Chains
The growth of public mobility and national economic activity requires adequate public transportation capacity. In the railway sector, this need is supported by thousands of rolling stock units that must be available, maintained, and ready for operation to serve passenger travel and the distribution of various commodities.
Based on data as of June 2026, PT Kereta Api Indonesia (Persero) manages a total of 12,856 rolling stock units consisting of 551 locomotives, 1,064 Electric Rail Trains or KRL, 2,238 passenger coaches, 8,907 freight wagons, as well as 96 Diesel Electric Rail Trains/Indonesia or KRDE/I.
This number reflects the scale of rolling stock management required to maintain the continuity of railway services across various regions. Every day, rolling stock readiness must be aligned with travel schedules, capacity needs, operational patterns, track characteristics, as well as the types of commodities served.
Vice President Corporate Communication KAI, Anne Purba, explained that rolling stock is one of the main elements in maintaining the capacity and reliability of the rail-based transportation system. According to her, public mobility and logistics distribution require the readiness of sufficient rolling stock, as each locomotive, KRL, passenger coach, freight wagon, and KRDE/I has complementary functions to ensure services remain safe, reliable, and in accordance with needs.
Of the total rolling stock, 8,907 units or approximately 69.28 percent are freight wagons. This is followed by 2,238 passenger coaches or 17.41 percent, 1,064 KRL or 8.28 percent, 551 locomotives or 4.29 percent, and 96 KRDE/I or around 0.75 percent.
Locomotives are used as the driving force for both passenger and freight train sets. Passenger coaches serve customers, while freight wagons support the distribution of commodities based on type, capacity, and handling requirements. KRL and KRDE/I support services in urban areas, agglomerations, and local routes according to their respective operational characteristics. These functional differences also determine crew requirements, train formations, inspection patterns, maintenance cycles, as well as supporting facilities that must be prepared.
The scale of rolling stock management goes hand in hand with the high demand for rail-based transportation. Throughout the first semester of 2026, KAI Group served 258,993,359 customers, an increase of 7.55 percent compared to 240,805,920 customers in the first semester of 2025. This increase indicates the growing role of railways in supporting travel for work, education, business activities, access to service centers, tourism, as well as inter-regional travel. Anne added that customer growth needs to be accompanied by well-planned capacity readiness, where rolling stock availability, technical reliability, maintenance facilities, and continuous renewal are interconnected elements in meeting public mobility needs.
In freight services, KAI recorded a volume of 32,498,043 tons throughout the first semester of 2026. This amount consists of 26,534,095 tons of coal and 5,963,948 tons of non-coal goods. Non-coal commodities served include cement, fuel, containers, bulk and plantation commodities, general cargo, as well as parcel shipments. These services support energy needs, construction, industry, trade, and supply chains in various regions.
Each commodity requires different types of wagons, locomotive power, train formations, travel patterns, and loading and unloading facilities. Therefore, the growth of logistics services needs to be balanced with the readiness of rolling stock in accordance with the development of industrial needs and cargo characteristics.
Before being put into operation, each rolling stock unit undergoes inspections to ensure compliance with technical, safety, and operational requirements. Periodic maintenance is carried out based on operating time, mileage, component condition, and inspection results by personnel. This maintenance is conducted through depots and Balai Yasa based on the level and scope of work. Depots perform inspections and maintenance to support daily operations, while Balai Yasa carries out periodic maintenance and work with a broader scope.
According to Anne, maintaining the readiness of thousands of rolling stock units requires long-term planning that includes procurement, renewal, maintenance, spare parts availability, strengthening human resource competencies, as well as the development of maintenance facilities. The sustainability of railway services requires connectivity between operational needs, technological development, industrial capacity, standardization, and investment planning, and the synergy of all stakeholders is essential so that rolling stock capacity can continue to keep up with the development of customer mobility and national logistics needs.
KAI continues to strengthen coordination between operational units, depots, Balai Yasa, train control officers, and other supporting units. Information regarding the condition of rolling stock is used to align inspection and maintenance schedules with service needs.
Anne concluded by stating that with strong planning and ecosystem support, railway rolling stock can continue to be developed to respond to the growth of public mobility, strengthen inter-regional connectivity, and maintain the smooth flow of national supply chains.