Russia: The development is being undertaken by two engineering centres, part of Sinara – Transport Machines (STM): the design bureau of the Kalugaputmash plant and STM’s own research and development centre. The project is currently in a preliminary phase, with engineers designing digital models, defining the configuration and integration of the future vehicle’s systems.
The four-axle self-propelled railcar is designed for a maximum speed of 140 km/h, matching the performance of the AM-140, approved in 2019 and delivered in series to Russian Railways. According to STM, the new model will feature main components revised to increase technological sovereignty, a modified equipment layout, and a modular driver’s cab similar to that used on the PMA-3 ballast tamper.
The future self-propelled railcar is intended to combine multiple functions through a variety of interchangeable modules, capable of tasks ranging from welding to overhead contact line repair. The manufacturer claims it could functionally replace three separate track machines. “We expect that the characteristics of the self-propelled railcar under development will allow it to find application in servicing high-speed lines”, stated STM’s executive director, Vitaly Votolevsky.
Earlier in January 2025, another market player, the Tikhoretsk Machine Construction Plant, also announced development of a self-propelled railcar for HSR maintenance. That model also features a four-axle running gear and comprehensive functionality, but is designed for a lower maximum speed of 120 km/h.
In 2020, the Remputmash Group estimated the fleet of such railcars within Russian Railways at approximately 600 units, with an average wear rate of around 40%. No large-scale procurement contracts for these vehicles have been announced over the years.
