The S4 is on its way! Connecting Hamburg and Bad Oldesloe.
DB InfraGO AG
Latest NewsThe resident information for the construction work in July 2025 is online.More information
Opening hours in our S4-Info Train
Thursdays, 3.30 – 5.30 p.m. Tuesdays for groups by previous appointment at S4 (at) deutschebahn.com
More convenient, more efficient and more punctual
Passenger numbers on northern German rail services have risen sharply in recent years, and the necessary mobility turnaround is expected to lead to even more people switching to rail in the future. To make this possible, the infrastructure at the Hamburg hub is being massively expanded. Passenger numbers have also been rising steadily for years on regional services between Hamburg, Ahrensburg and Bad Oldesloe. 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.
Protecting flora and fauna is of vital importance to Deutsche Bahn and all of our project partners. Together, we have designed a range of measures along the route that will safeguard water and soil quality as well as protect the existing landscape. We are working to ensure that the new S-Bahn does not pose a threat to endangered species such as the great crested newt.
The plans for the S4 line include comprehensive active and passive noise mitigation measures, such as trackside barriers and a host of other features. Our website contains detailed information about these and about how our work will change noise levels along the line.
We want you to have the most comprehensive information possible about the S4. What is the current status of the project plans? When will construction work start? And what impact will the project have on people and nature? We have identified the key questions about the project and now have the answers for you.
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.
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!
Friday, 20. June 2025
The S4 as a lighthouse project at the most important public transport event
DB InfraGO AG
The well-attended S4 stand at the UITP Summit
The UITP Summit took place in Hamburg from 15 - 18 June 2025. This is considered the world's largest event in the field of sustainable mobility. We are delighted to have been chosen by Anjes Tjarks (Senator for Transport and Mobility Transition of the Hanseatic City of Hamburg) as a lighthouse project to represent the city of Hamburg and communicate the importance of the S4 project to experts from over 100 countries.
Many interesting conversations took place at our project stand with visitors from all over the world, such as Spain, Singapore, the USA and Canada. We were not only able to present the project, but also to inspire our dialogue partners. Our experts from various specialist areas of the S4 project were available to answer visitors' questions. The most common topics were the project timetable, the frequency of operations, the new route with its new stations and the current construction activities. To give visitors an even better insight into the project, they had the opportunity to attend a ‘technical visit’ on 19 June and experience the current construction progress up close during a guided tour of our construction site.
Participating in the UITP Summit was an enriching experience for the S4 team. The positive impressions gained and the discussions had a fulfilling effect, helping us to drive the project forward with renewed vigour.
We would like to thank all interested parties for their attendance and the successful UITP Summit!
Friday, 23. May 2025
A look behind the scenes – discover the S4 construction site!
DB InfraGO AG
Discover the construction site of the S4 S-Bahn line on a guided tour!
Would you like to experience firsthand how the new S4 S-Bahn line is being built? Then take advantage of this opportunity and secure your spot on one of our guided construction site tours!
Dates:
Thursday, June 26, 2025
Thursday, July 31, 2025 (fully booked)
Thursday, August 28, 2025
Location: Hammer Straße 44, 22041 Hamburg
Schedule:
The tours start at 1:30 p.m. and last approximately two hours.
Afterwards, we invite you to visit our S4 information train – it is open every Thursday from 3:30 p.m. to 5:30 p.m.
Good to know:
For your safety, we provide helmets and high-visibility vests. Please remember to wear sturdy shoes.
How to register:
The number of participants is limited – places will be allocated on a first-come, first-served basis.
We look forward to your visit to the construction site!
DB InfraGO AG
Impressions from past construction site tours.
DB InfraGO AG
Impressions from past construction site tours.
DB InfraGO AG
Impressions from past construction site tours.
Tuesday, 18. February 2025
Highlights 2024
DB InfraGO AG
Progress in the S4-Project in 2024.
And that's how quickly time flies! We can now look back on a year full of milestones and highlights that we achieved through hard work and passion. Of course there were also hurdles that we had to overcome, but let's take a look together at everything we have achieved.
Construction progress in construction section 1
DB InfraGO AG
Progress in construction section 1 in 2024.
DB InfraGO AG
Progress in construction section 1 in 2024.
DB InfraGO AG
Progress in construction section 1 in 2024.
DB InfraGO AG
Progress in construction section 1 in 2024.
We are very pleased with the progress we have made in the construction section 1 this year. Highlights include the commissioning of the electronic interlocking system in Hasselbrook and the start of the trial operation of the MetaWindows. However, further construction progress along the route has also been very exciting, including the construction of the retaining walls by our S4-Info Train by Hammer Strasse and at Am Neumarkt , as well as the start of the shoring work, i.e. work to stabilize the subsoil, for the Hasselbrook flyover structure.
Planning for construction sections 2 & 3
DB InfraGO AG
Milestones in the planning of construction sections 2 & 3 in 2024.
DB InfraGO AG
Milestones in the planning of construction sections 2 & 3 in 2024.
DB InfraGO AG
Milestones in the planning of construction sections 2 & 3 in 2024.
DB InfraGO AG
Milestones in the planning of construction sections 2 & 3 in 2024.
2024 was also a big year for the planning of the construction sections 2 and 3. The year started with a significant step: the IPA market dialogue, which served the purpose of finding partners for the integrated project alliance (IPA) which will be implemented in construction sections 2 and 3. The hearing for construction section 2 also took place last year and we were able to obtain the planning approval decision for the individual measure Bargteheide. Another exciting development is the start of the renovation work at the Rahlstedt central bus station. A completely new S-Bahn station will be built here later on.
Public Relations
DB InfraGO AG
Highlights der Öffentlichkeitsarbeit im Jahr 2024.
DB InfraGO AG
Highlights of public relations in 2024.
DB InfraGO AG
Highlights of public relations in 2024.
DB InfraGO AG
Highlights of public relations in 2024.
DB InfraGO AG
Highlights of public relations in 2024.
DB InfraGO AG
Highlights der Öffentlichkeitsarbeit im Jahr 2024.
DB InfraGO AG
Highlights der Öffentlichkeitsarbeit im Jahr 2024.
Last year we again had the joyful opportunity to exchange ideas with you in various formats and to publicly represent the major S4 S-Bahn line project. Our highlights included the Connecting Europe Days conference in Brussels, the S4-Info Train campaign, through which we were able to attract many new visitors to the Info Train, receiving the ICPMA Award in New York, Rail Day in September, where we showed you around our construction site and were pleased to receive a lot of positive feedback, and most recently, the information evening on area and property management for construction section 2.
The active political exchange was also again very positive this year. We received visits from various politicians at our construction site and in our office, as well as going to visit them.
