Update 23 October: Continued impact on Stockholm–Uppsala train traffic on Monday

The train traffic between Stockholm and Uppsala will continue to be affected on Monday 27 October. Trains are running again but with fewer departures due to extended track work in Knivsta.

Read more here or below under the heading “How services are affected on Monday 27 October.”

Why are the trains cancelled?

The Swedish Transport Administration (Trafikverket) is carrying out a major construction project north of Uppsala Central Station, building two grade-separated crossings to improve safety and traffic flow for cars, pedestrians, and cyclists. At the same time, a new turning track is being built to enable increased train traffic at Uppsala Central.

During the weekend of 24–26 October, work will be completed on the new turning track, all temporary tracks will be removed, and the train control system will be upgraded. Once the connection work is finished, the new railway installation will be put into operation.

How Mälartåg services are affected

Illustration showing train services during the track work:

Station hosts

In Uppsala and Knivsta, station hosts from Mälartåg and SL will be present at the stations and bus stops for most of the day to help guide passengers. At Stockholm Central, Mälartåg station hosts will be on site on Friday afternoon and during the daytime over the weekend.

Uppsala–Stockholm

• No trains will run all the way between Uppsala and Stockholm. Instead of departures every 30 minutes, Mälartåg will operate hourly services between Knivsta and Stockholm. Trains may be crowded — avoid travelling unless necessary, especially on Friday afternoon. If you can work from home that day, please do so.
• Passengers must transfer to replacement buses between Uppsala and Knivsta.
• Trains between Stockholm and Knivsta via Märsta will run once per hour in both directions (train numbers 8xx). Departures from Knivsta towards Stockholm will leave earlier than usual.
• Trains from Örebro and Eskilstuna (9xx trains via Arlanda) are completely cancelled between Stockholm and Uppsala. Passengers should change in Stockholm to trains running via Märsta.

Travel to and from Arlanda

There are no Mälartåg departures to or from Arlanda.
Use SL commuter trains instead, or take Mälartåg to Märsta and continue to Arlanda by SL bus or another mode of transport.
For travel to and from Uppsala, UL bus 801 is recommended.

Replacement buses

• From Uppsala C: Buses towards Knivsta/Stockholm depart from bay E7 at the Travel Centre.

• In Knivsta: Replacement buses for Mälartåg and SL depart from a temporary stop on Apoteksvägen near the station — follow SL’s posted signs.

See the map of replacement stops at Uppsala C.
See the map of the replacement stop at Knivsta station (Apoteksvägen).

Changed departure times

• Southbound trains from Knivsta depart 6 minutes earlier than usual.

• Northbound trains from Stockholm arrive in Knivsta 8 minutes later than normal.

Always check the latest departure times in the app or at malardalstrafik.se.

SL commuter trains

SL commuter trains will turn around in Knivsta and run as normal between Knivsta and Stockholm via Arlanda C.
Read more at sl.se.

Uppsala–Gävle

Trains are replaced by buses between Uppsala and Vattholma (no stop in Storvreta). Transfers between bus and train take place in Vattholma. Trains run as usual between Gävle and Storvreta.
For travel between Uppsala and Storvreta, use UL lines 110 or 115.

Uppsala–Sala

Trains are replaced by buses between Uppsala and Sala.

Replacement buses

From Uppsala, buses to Gävle and Sala depart from bay C1 at the Travel Centre.
See the map of the replacement bus stop.

Important to keep in mind

• Travel only if necessary, especially between Stockholm and Uppsala, where trains may be crowded.
• Allow extra travel time.
• Stay updated through timetables on malardalstrafik.se, sl.se, and ul.se.

The weekend will be challenging for many commuters and residents in the Uppsala area.
Mälartåg, SL, and the Swedish Transport Administration are working together to minimise disruptions and ensure safe travel for everyone who needs to travel — while these works pave the way for a more reliable railway in the future.

Traffic status on Monday 27 October

On Monday, trains will only be able to operate on a single track between Knivsta and Uppsala. This will affect services, resulting in fewer departures throughout the day.

Train services on Monday:

• Once per hour: Mälartåg between Stockholm and Uppsala, via Märsta and Knivsta. Applies in both directions. (Mälartåg train numbers 8xx)

• Once per hour: SL Commuter Trains between Stockholm and Uppsala. Other departures will terminate at Upplands Väsby. (Commuter trains with train numbers 22xx)

• Mälartåg from Örebro–Eskilstuna, which normally continue to Uppsala (Mälartåg train numbers 9xx), will terminate in Stockholm. If you are travelling onward to Uppsala, you will need to change trains at Stockholm Central.

Since traffic can only use one track, delays of up to 15 minutes per departure may occur.

If you have a Mälartåg single ticket or a Movingo period ticket, you may also travel with SL Commuter Trains between Stockholm C and Uppsala.

Travel to and from Arlanda on 27 October

No Mälartåg services will operate via Arlanda.

Stockholm–Arlanda:

• SJ Commuter Train (22xx) towards Uppsala

• Mälartåg to Märsta, then SL bus 583

Uppsala–Arlanda:

• SJ Commuter Train (22xx) towards Södertälje

• UL bus 801