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Our areas of expertise

Design – Construction – Maintenance
The complementarity of our 12 areas of expertise has made us a rail specialist, but also a multi-skilled integrator able to delivery turnkey projects that cover infrastructures’ entire life cycle.
Civil engineering
Railway signalling
Low-voltage and telecoms
Infrastructure management
Distribution sub-stations
Railway safety
Overhead lines
Rolling stock maintenance
Electro-mechanical and safety equipment
Our areas of expertise

System integration

  •  iconDistribution sub-stations Distribution sub-stations

    Colas Rail is specialised in designing, installing and putting into service electrical installations such as EALE sub-stations, electrical distribution and powering auxiliaries.

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  •  iconRailway signalling Railway signalling

    Colas Rail designs control and communication systems to ensure traffic safety.

  •  iconTracks Tracks

    Colas Rail is the undisputed leader and specialist in high-speed lines in France and on international markets.

  •  iconElectro-mechanical and safety equipment Electro-mechanical and safety equipment

    Colas Rail provides electro-mechanical safety systems: ventilation, smoke extraction, pumping, lighting emergency exits, mechanisation of escalators and lifts.

  •  iconLow-voltage and telecoms Low-voltage and telecoms

    Colas Rail designs and builds low-voltage systems that transport Voice / Data / Image information via wired or wireless networks (radio, WI-FI, GSM…) and technical and audio-visual supervision systems for transport infrastructures.

  •  iconOverhead lines Overhead lines

    Colas Rail designs and builds electrification systems (overhead lines, contact lines and third rail), meeting the most complex demands.

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  •  iconInfrastructure management Infrastructure management

    Colas Rail carries out comprehensive management services for railway infrastructures for private companies: multimodal platform management, upkeep, maintenance, railway operations, audits, and works.

  •  iconTraining Training

    Approved by EPSF (, CampusFER is Colas Rail’s training, evaluation and examining body. It offers a catalogue of some sixty training courses for everybody working in the railway sector.

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  •  iconRolling stock maintenance Rolling stock maintenance

    Colas Rail offers rolling stock maintenance services for works and commercial trains for all companies in the sector.

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  •  iconRailway safety Railway safety

    Colas Rail brings together all the skills linked to the safety of work on the network, on closed lines and lines in operation: certification and safety warnings.

  •  iconHeavy vehicle Heavy vehicle

    Colas Rail operates and maintains, as part of maintenance operations, different types of heavy railway machinery, either on its own or on behalf of its client.

  •  iconCivil engineering Civil engineering

    Colas Rail conducts specific engineering work in tunnels (reinforcements, gauge adjustments, mining, etc.) and foundations.