The new S4

The S4 project from Hamburg to Bad Oldesloe

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Latest NewsInformation for local residents: construction work in MayMore information

More convenient, more efficient and more punctual 

Regional rail services between Hamburg, Ahrensburg and Bad Oldesloe have seen a steady increase in passenger numbers in recent years. We are responding by constructing the S4. This new S-Bahn line will provide the region's inhabitants with better local transport between Hamburg and Bad Oldesloe. Some 250,000 people will benefit from this new service.

Opportunities and Benefits      Financing 

In-depth information about the planning process and our construction work

20 kilometres of existing line from Hasselbrook to Ahrensburg-Gartenholz will be upgraded for the new S-Bahn service. The project consists of three sections. Each of them has its own specific planning procedure, which means separate approval is necessary for every section. 

Our project diary

There's a lot happening when it comes to the planning and construction of the new S4. Our project diary keeps track of the latest developments and follows how the project is going. Members of the project team also provide details about their work so you know more about what's happening in the background. It's a mine of interesting information. Enjoy!

Monday, 2. May 2022

The S4-Team wishes a blessed Eid!

S4 Osterkarte


Thursday, 14. April 2022

The S4-Team wishes you happy easter!

S4 Osterkarte


Thursday, 3. March 2022

S4 website also in English now!


The S4 is a project of great public interest and one of the largest construction projects in northern Germany.  But the project is not only important on a national level: the Hamburg-Lübeck line is also very significant for the pan-European transport network.

To give all interested parties the opportunity to get information about the project, our website is also available in English now. You can switch between languages by clicking on the language symbol in the top right corner.