Railway Installation
Railway installations are an essential part of a safe, reliable, and high-performing rail system. At Aarsleff Rail, we bring expertise in critical systems such as signaling, interlocking, low- and high-voltage electrical installations, and potential equalization.
Types of Installations
Aarsleff Rail has extensive experience in working with signalling and interlocking. On every project, our in-depth knowledge of different installation types adds value for both clients and partners.
During track renewal projects, we dismantle signaling and interlocking components—such as balises and axle counters—before construction begins. After the track work is completed, we reinstall, test, and commission the systems to ensure full functionality before reopening the section. Our team includes certified personnel for the testing and commissioning of all types of interlocking systems.
Through ongoing maintenance contracts, we support customers in managing a wide range of signaling and interlocking systems—from older relay and PLC-based systems to Automatic Train Control and the latest ERTMS systems. Our maintenance tasks include inspections, fault prevention, component replacement, and regular standby response in the event of malfunctions.

Working on electrical installations in or near railway environments requires specialized skills and certifications. Aarsleff Rail handles all types of high-voltage electrical projects related to railways and adjacent infrastructure. Our experience includes the installation and upgrading of:
- Level crossings
- Point heating systems
- Emergency power supply system
- Platform installations (platform lighting, speakers and monitors)
- Train preheat and power supply
- Cooling systems and pumping stations
We are fully authorized to perform electrical installation work throughout Scandinavia and Germany under the following national regulations:
- Danish regulation for electrical installations
- Swedish Electrical Safety Agency
- Directorate for Civil Protection and Emergency Planning, Norway
- Handwerkskammer Flensburg, Germany
