of the Vienna Woods Tunnel is west of Hadersdorf junction. From this point, the line can be run at up to 250 km/h. The line resurfaces after 13 km at Chorherrn near to the Tulln Basin. The regional station of Tullnerfeld is situated in the Tulln Basin. The high-speed line has been connected to the Franz Josef Railway by the reactivation of disused Tulln western curve, promoting regional traffic. After passing through three cut-and-cover tunnels that were built for noise abatement reasons in an open cutting, the line runs through three more tunnels, known as the Perschling tunnel chain (Tunnelkette Perschling). The line then runs to Wagram junction in St. Pölten, which now forms the end of the new Western line. Simultaneously with the construction of the new high-speed line, the railway stations in Vienna and St. Pölten are being rebuilt. Vienna Hauptbahnhof was opened on 9 December 2012 for partial operations and will be fully completed by 2015. St. Pölten station was rebuilt at the end of 2011. Rohr junction‒Ybbs an der Donau Immediately following St. Pölten station runs through a right-hand bend, which can be run at up to 80 km/h, a short straight section and a left-hand curve through the 460 metres-long Eisbergbogen Tunnel, which was newly built in 2010/11 and which can be run through at 160 km/h. At the end of the curve, Linienzugbeeinflussung (LZB) signalling starts, allowing operations at 200 km/h. The line here has three tracks (including the congestion track between St. Pölten Hbf and Prinzersdorf south of the two-track main line, with its own tube through the Eisbergbogen Tunnel) to Prinzersdorf, then two tracks through the Markersdorf an der Pielach station to Rohr junction, where it fans from two to four tracks. Here the Old Western Railway branches to the northwest to Loosdorf station, while the New Western Railway runs to the south of the town through a “green” tunnel. To the northwest of Loosdorf the two lines come within a few metres of each other before the new line takes a slight curve to the left to the entrance of the Wachberg 2 Tunnel. Shortly after its western portal it runs through the Melk Tunnel, which takes its name from the nearby town. Immediately afterwards it runs over a bridge over a small river before turning to run parallel with the old line, which has been rebuilt on the new alignment.