the interweaving of long-distance and suburban tracks at the junction of the lower silesian-märkische railway and the eastern railway led to increasing congestion. the location of the intersection with the ringbahn had insufficient space, so a new grade-separated junction was built on the main line from frankfurt (oder) 2 km away at rummelsburg depot. from there a line ran to the northeast to connect with the main line just to the west of kaulsdorf. an additional platform was opened at kaulsdorf station in 1901 for the traffic on this line, known as the vnk line. “vn” may have stood for "verbindung nach" (connection to) or "von und nach" (from and to) while k probably stood for kaulsdorf or küstrin. the old platform was left on the original line for suburban services to the ringbahn. to the west of this was the link with the stadtbahn suburban tracks. in 1903, a separate pair of suburban tracks was laid next to the frankfurt (oder) line between the intersection of the long-distance lines at rummelsburg and the start of the stadtbahn. this required a grade-separation of the stadtbahn tracks with the link to the silesian station.