Vienna S-Bahn: 14 months of closure and nighttime disruptions

The main closure affects the section between Vienna Hauptbahnhof and St. Marx, and Vienna Praterstern. During the construction phase, no S-Bahn trains can operate in this section. ÖBB will be renewing viaducts, bridges, retaining walls, tracks, and stations.

According to the Austrian Ministry of Infrastructure, approximately 700 trains operate on the core route each day. On weekdays, about 250,000 passengers use this connection. A complete replacement service with buses between the main station and Praterstern is not planned. ÖBB and Wiener Linien cite the limited capacity of buses and heavy road traffic.

Instead, the existing network will be reinforced. Intervals of 2 minutes and 20 seconds are planned for the U1, 3 minutes and 20 seconds for the U2, and 3 to 3 minutes and 20 seconds for the U4. For the U6, intervals of 2 minutes and 40 seconds are planned, along with a reserve train during the morning rush hour.

Lines O, 18, and 62 will also take on additional tasks. Line O is planned to operate every 5 minutes with longer trains. Line 18 will be extended to the stadium and is planned to run every 6 minutes. Line 62 will be rerouted to the Belvedere district and, according to the plan, will run every 7 minutes and 30 seconds. In addition, an ÖBB shuttle will connect Meidling with the U4 station Längenfeldgasse.

Prior to the main construction period, there will be a summer closure between Floridsdorf and Praterstern from July 4th to September 6th, 2026. Due to a cable fire at Praterstern, parts of the planned timetable were already in effect from August 14th. Timetables may be further adjusted throughout the construction phase.

The closure affects several connections simultaneously. Regional trains S1, S2, S3, S4, and others will lose their direct connection through the center of Vienna. Depending on the origin and destination, different transfer routes will apply.

Between Wien Hauptbahnhof (main station) and Praterstern, the U1 (subway line) is the most direct alternative route. For St. Marx, options include tram line 18 towards Hauptbahnhof and Stadion, as well as line 71 towards Rennweg and Karlsplatz. The ÖBB shuttle in Meidling is intended to alleviate congestion on the U6 (subway line) by connecting to the U4 station Längenfeldgasse.

ÖBB (Austrian Federal Railways) tickets are not generally accepted throughout the entire network of Wiener Linien (Vienna public transportation). Acceptance is only valid on specifically designated routes. These include, among others, the U1 between Hauptbahnhof and Praterstern, the U2 between Praterstern and Stadion, as well as defined sections of lines 18 and O.

Connections from Lower Austria will also change. According to the alternative plan, REX2 and REX3 will terminate in Wolkersdorf and Korneuburg, respectively. Replacement buses will operate to hubs such as Floridsdorf, Handelskai, or Praterstern. REX1 will be rerouted via Stadlau and Simmering to Hauptbahnhof.

Several different solutions are available for travel to the airport. During the main construction period, S7 will terminate at St. Marx. REX7 and long-distance trains will continue to operate via Hauptbahnhof to the airport. The CAT (City Airport Train) will use buses between Wien Mitte and the airport. In addition, connections are available with Vienna Airport buses.

ÖBB recommends that passengers who require assistance for an accessible journey register at least 24 hours before travel. Bicycles are not permitted on rail replacement buses. Connections and available elevators should therefore be checked shortly before departure using SCOTTY and WienMobil.

ÖBB confirmed to DER STANDARD that regular maintenance windows are planned for 2028. According to a report from August 29, 2026, the section between Vienna-Meidling and Vienna-Floridsdorf is scheduled to be closed once a week, on Monday nights, from January to December.

These night-time closures are not equivalent to another prolonged, continuous closure. They are intended to make necessary maintenance work more predictable. Tracks, switches, overhead lines, signals, bridges, and stations will remain maintenance-intensive infrastructure even after modernization.

At the time of the original text, the plans for 2028 were not yet displayed in this level of detail on the publicly accessible pages of ÖBB. The confirmation is based on information provided by ÖBB to DER STANDARD. The exact times, exceptions for holidays, possible shortening of individual nights, and the specific replacement plans are still to be determined.

The regular maintenance windows do not contradict the modernization. The line is intended to be used more frequently in the future and to accommodate longer trains. Planned work at night should make maintenance compatible with the intensive daytime operation.

The modernized line is intended to offer longer platforms, longer trains, and more seating. The Ministry of Infrastructure states that by 2028, the number of seats will increase by approximately 40 percent. A frequency of approximately two and a half minutes is aimed for during peak hours.

ETCS Level 2 also includes a digital train protection system. Stations such as Rennweg and Quartier Belvedere will be modernized. The project therefore not only includes the renewal of existing structures but also increases capacity for future operations.

ÖBB points out that timetables may be continuously adjusted during the construction phase. Therefore, the most up-to-date information is available in the SCOTTY app (ÖBB), WienMobil, and traffic announcements on the day of travel.

• Check the line number and the actual final destination.
• Verify the validity of the existing ticket for the planned alternative route.
• Distinguish between different options for airport transfers, including S7, REX7, long-distance trains, and the CAT bus.
• For barrier-free travel, clarify the availability of elevators and any necessary assistance in advance.
• Allow extra time for journeys between 7:00 AM and 8:00 AM, as Wiener Linien recommends avoiding this peak hour if possible.

The officially communicated 14-month period runs from September 7, 2026, to the end of October 2027. A simple calendar calculation based on October 31, 2027, results in 419 days. This calculation is not an additional official deadline, as the exact final day of the closure may depend on the construction progress.