200 km/h. RS1 – Prague–Brno–Ostrava, with possible extension to Katowice in Poland. RS2 – Brno–Breclav, with possible extensions to Vienna in Austria and Bratislava in Slovakia. RS3 – Prague–Plzen, with possible extension to Munich in Germany. RS4 – Prague–Ústí nad Labem, with possible extension to Dresden in Germany. RS5 – Prague–Liberec or Hradec Králové, with possible extension to Wrocław in Poland. In 2018, Správa železnic, the Czech Railway Infrastructure Manager, began working on three pilot projects for increasing speed on pre-existing lines. These include the sections between Prague and Poříčany (30 km), Brno and Vranovice (25 km), and Přerov and Ostrava (60 km). In 2020, German Deutsche Bahn (DB) and Government of Czech Republic agreed to undertake construction of the new high speed rail link between Prague and Dresden (RS4), and started feasibility studies. The project is estimated to cost a total of 5.4 billion euros, and will include a 25 km tunnel beneath the Ore Mountains. The travel time on the current route is 2 hours and 15 minutes, but the new link is predicted to reduce travel times between Prague and Dresden to just 60 minutes. The first section, between Prague and Lovosice, is predicted to be completed before 2035, with the rest completed by 2050. Denmark A high-speed rail is being planned as a double track between the Copenhagen–Ringsted Line, which opened in 2019. It initially allows 200 km/h with the rail infrastructure prepared for 250 km/h when signalling is upgraded. There are plans to upgrade the existing railway Ringsted–Odense to 200 km/h or more. The existing Ringsted–Rødbyhavn is being upgraded to 200 km/h, in preparation for the completion of the Fehmarn tunnel, allowing fast connection between Copenhagen and Hamburg. In 2021 construction began on the new Vestfyn Line, a new 250 km/h line connection Odense on the island of Funen to the existing bridge to Jutland, but with considerations for alignment to a future bridge allowing high speed crossing of the belt. There are plans to build a new railway for 250 km/h Odense–Aarhus. These projects are planned to reduce the travel time Copenhagen–Aalborg to three hours compared to 4:20 as of 2018, and to one hour between each of Copenhagen, Odense, Aarhus and Aalborg. A proposal led by lobbyists is the HH Tunnel Helsingør–Helsingborg, with connecting high speed railway Copenhagen–Helsingør. This one has no decided year for realisation. A proposal led by lobbyists is also