Kertosono–Bangil railway

Kertosono–Bangil railway is a railway line that connects Kertosono to Bangil via Malang, East Java. This line is part of Surabaya Operational Area VIII in the Bangil–Wlingi segment and Madiun Operational Area VII in the Talun–Kertosono segment, which are separate from the main line. KAI Commuter manages all train stations serving the Dhoho and Penataran Commuter Line. This railway line is a branch line from the ‘’'southern line'‘’ of Java in the Kertosono–Malang segment.

This route is collectively part of the East Java pocket route. On this line, there are two domestically constructed tunnels named Karangkates I and II, built adjacent to the Sutami Reservoir in 1967–1969, specifically on the section of track between Sumberpucung and Pogajih. In addition, there is also the Lahor railway bridge, which is the longest bridge on the line. This line was built by the Surabaya Class I Railway Engineering Office under the Directorate General of Railways. All of these railroad tracks are single and use Siemens & Halske AG semi-automatic mechanical signaling, except for the two ends of the line, which use electric signals, and Purwoasri, which uses an electromechanical block system.