Chascomús was one of the main stations of the Constitución - Mar del Plata railway service. The BAGSR operated the line until the Railway nationalization of 1948 when the Argentine state purchased all the British and French-owned railway companies. Since then, Ferrocarriles Argentinos ran all the services to Mar del Plata until 1993 when the Province of Buenos Aires took over the services through its company Ferrobaires and has been running services to date. Nevertheless, the original route to Mar del Plata used tracks that crossed downtown Chascomús, with more than 17 level crossings existing. That also meant trains had to run at very low speed when crossing Chascomús in order to prevent accidents, generating significant delays in the time of journey. To put an end to this, a new building that operated as both railroad and bus terminus, was projected during the Presidency of Raúl Alfonsín. The original project included construction of a new route for the tracks, moving them to a suburban area of the city to prevent accidents. The successive economic crisis in Argentina halted construction, until the station was indefinitely abandoned without being finished. Almost 20 years later, the project was put into discussion again by the Argentine state, with only two level crossings projected. Finally, four level crossings were allowed to be opened. Works to move tracks were committed to Spanish company COMSA EMTE in 2013. The company built a new line of 20 km length to avoid the big amount of level crossings of the old route. When the new railway/bus terminus was inaugurated on December 19, 2014, the old station was closed. In December 2014, brand new trains acquired by the Government of Argentina from the Chinese company CSR, started to run luxury services from Constitución to Mar del Plata, operated by the nationalstate-owned companySOFSE. Standard service continued to be operated by now defunct company Ferrobaires. Nevertheless, in 2015 long-distance services from Constitución to Mar del Plata were suspended due to the bad conditions to run trains. Tracks and sleepers broken, a deficient signalling system, poor visibility in level crossings, and bad conditions of the communication systems, where some of the reasons alleged. In July 2016, local services between Alejandro Korn and Chascomús were cancelled by the Ministry of Transport. In July 2017, the Constitución–Mar del Plata service was reestablished, with four daily services that include a stop in Chascomús.
