Infrastructures 2018-02-21T11:07:20+00:00


Demand for rail travel has significantly increased in recent years. As a result, our clients require a safe and efficient railway that meets the needs of their customers in terms of frequent services and convenient routes. On top of that, electrified railways provides low carbon emissions.

From development of new rail schemes to upgrade and electrification of existing railways SDEA helps our clients through the entire project lifecycle to delivered integrated solutions that improve experience of all passengers and freight services.

The Overhead Line Equipment (OLE) design relies on the supply of electrical power to the vehicle units. Power is supplied through the catenary via interaction with the pantograph.


The main mission of an OLE designer is to ensure compatibility and correct performance of these two main parts to achieve project requirements. OLE design implies to cover very long distances of railway where power needs to be supplied to the vehicle. A designer must be able not to just provide solutions for open routes, but for specific points of the infrastructure that need high accuracy and detail to comply with all safety and design standards.

Tunel Train

We produce OLE Layouts plans with all the require design information as position of OLE structures, wire run heights and staggers and position of other lineside equipment. We develop Cross-sections of each structure showing all the relevant information for its construction including Bill of Materials.

Our team has works with several basic design ranges, NR Series 1, NR Series 2, NR GEFF, OLEMI and others including conductor beam and tram wire. These systems span between 25kV AC supply to 750V DC and maximum operating speeds of 225km/h.

Designs are developed from onsite survey data as for example Point Cloud technology which provides a virtual accurate perspective of the site. Please refer to our BIM modelling section to find out more about this technology.


Points clouds

LiDAR (light detection and ranging) is an optical remote-sensing technique which take samples of the surface of the earth, obtaining accurate x,y,z dimensions. All data collected from LiDAR compounds the Point Clouds. Point Clouds are vectors based structure – each point has its XYZ coordinates and attributes called components which represent time, flight line, intensity, colour, etc. Point cloud data can be managed, visualized, analysed and shared using different CAD software.

SDEA team works merging point clouds with design models to create a 3D model which enable efficient design review, effective team collaboration and meets BIM criteria included in BS 1192.This integrated model allows the creation of 4D schedules showing each construction phase, supports project review, signal sighting, enables clash detection and is even used in trainings for new drivers. 4D technology directly links the 3D model and the construction plan and allows planners to schedule and coordinate the tasks which can be visualized as a “virtual construction model”.

BIM Station

SDEA team has developed models for on route sections in the line which links Swansea to Cardiff. We have represented the lineside equipment all along the route as well as any visible element from the tracks as walls, fences, buildings, power supply towers, signal and traffic lights.

SDEA has, as well, developed models for every station of the same Welsh route, including the major ones: Swansea and Cardiff Central Station.

These models include every element in the stations with a realistic representation of platforms and buildings (with their respective furniture as doors, windows and seats), station lamps, signals, fences, stairs, footbridges, canopies as well as the tracks.

3D model is upgraded with photo-realistic textures which are created with a material library from CAD software. In this way a realistic model of the railway is built providing a virtual design of the future reality.