Solo Balapan–Kertosono–Surabaya Gubeng railway

Solo Balapan–Kertosono–Surabaya Gubeng railway is a corridor railway line in Southern Java which connecting between Solo Balapan and Surabaya Gubeng via Kertosono. This line as a busiest southern railway line that from Jakarta, Bandung, and Yogyakarta bound to Surabaya. Specifically, in Surakarta–Surabaya, which runs parallel to the Solo–Surabaya section of the Trans-Java Toll Road.

The Solo Balapan–Surabaya Gubeng route is a busy one because it serves as an intersection between the southern and northern routes of Java Island, connecting Jakarta or West Java with Central Java, Yogyakarta, and East Java, although the main route from Jakarta to Surabaya is the northern route of Java Island via Semarang.

The Solo Balapan line to the Sragen–Ngawi border is included in Operational Area VI Yogyakarta, the section between the Sragen–Ngawi border to Curahmalang is included in Operational Area VII Madiun, while the Mojokerto section is included in Operational Area VIII Surabaya. This line is entirely double track and is on a flat track, with a few hilly sections around Saradan District until entering Wilangan District. This line is built by the Semarang Class I Railway Engineering Center on the Solo Balapan–Kedungbanteng segment and the Surabaya Class I Railway Engineering Center on the Walikukun–Surabaya Gubeng segment.

Effective from 1 December 2019, two stations on this route (Barat and Paron) have changed their names to Magetan and Ngawi Station respectively.