This proposal complements the proposed Danube bend cut-off line, which would start near Štúrovo. It would link the two main lines from Wien (Vienna) to Budapest: one via Győr, the other via Bratislava and Nové Zámky. The proposal consists of a new bridge at Komárno (downstream from the existing bridge), and a new high-speed section (HSL) from there to Štúrovo. The town of Komárno /Komárom on the Danube has been divided since the break-up of the Austro-Hungarian Empire, currently between Slovakia and Hungary.
The line via Győr (German: Raab) is the former Wien-Raaber_Bahn. East of Győr, it runs alongside the Danube for about 15 km, passing through Komárom. The station is directly on the river bank. It then turns south-east to Tatabánya (avoiding the hills at the Danube bend), and enters Budapest from the south-west.
The line via Bratislava (formerly Pressburg), is the old imperial k.k. Südöstliche Staatsbahn. From Wien it runs almost due east (Marchegger Ostbahn), but the route through Bratislava is a detour. The continuation, the present Bratislava – Budapest line runs east to Nové Zámky, and then south-east to Štúrovo and the Danube Bend.
Outside of the three cities, there is one lateral connection between the main lines – the local line from Nové Zámky to Komárno, and then across a Danube bridge to its southern part, Komárom. The river is a boundary, which never benefits rail services, and the rail line is circuitous anyway.
The proposed double bridge would take trains from Győr into the existing Komárno station (north bank), but not through the riverside station in Komáron (south bank). The new 3-km link line would start about 1000-1500 m west of that station, on the line from Győr. It would first cross the main channel of the Danube, and then an island with low-density housing, and then a secondary channel. This channel is cut by a dam, so the former island is now a peninsula. The line across the island would be on viaduct, so demolition would be limited. On the north bank it would follow the alignment of the river port branch, with an improved curve into the station, which itself would be upgraded.
From Komárno station, the existing exit line would be upgraded: it is dead straight. At 3 km east of the station, it turns north-east: the new line would start here. It would run parallel to the Danube, about 3-5 km north of the river, to join the existing main line (from Bratislava), west of Štúrovo. The shortest route would be 38 km long, but it would cut through part of the village of Marcelová, and pass the edge of a nature reserve at Cenkov. Allowing for local adaptation of the alignment, the new section should still be no more than 40 km long.
At Štúrovo, the new line would connect both to the existing main line around the Danube Bend, and the proposed cut-off line. Both lead to Nyugati station in Budapest. In any case, high-speed inter-regional services would serve Komárno and Štúrovo (population 11 000).
The distance from Győr to Komárno would be 40 km, and from there to Štúrovo 42 km. The remaining route to Budapest, via a Danube Bend cut-off line, would be approximately 50-60 km long: the existing line via Vác is 78 km long.