Design Triangle


You have successfully submitted your enquiry. Someone from our company will respond ASAP

Rail Vehicle Design Specialists and Transport Design Consultants

The Maltings,
CB25 0HB,
United Kingdom
Fax Number

Transport design consultants Design Triangle specialise in rail vehicle design, including rail vehicle interiors, exteriors, cabs and components. High-profile projects include:

  • Heathrow Express vehicles: interior and exterior design
  • MTR Hong Kong Airport Express vehicles: design of the exterior and cab interior
  • TfL London Overground (East London Line) vehicles: interior concept designs
  • Docklands Light Railway: concept design for the new Bombardier stock
  • Bi-level railcars for Maryland and Virginia vehicles: design of interior panel system

With clients worldwide, including in Europe, the USA and Asia, we design rail vehicles for operators, vehicle manufacturers and component suppliers. New rail vehicles designed by Design Triangle are in service in Baltimore MD, Belfast, Brussels, Dublin, Hong Kong, London, Jakarta, Madrid, Manchester, Melbourne, Rotterdam and Washington DC.


Formed 20 years ago, Design Triangle comprises high-quality transport design consultants likely to have experience directly applicable to the design of your rail vehicles or products.

We provide an integrated service of rail vehicle industrial design, engineering design and ergonomics. The skills of a multi-disciplinary team allow us to deliver creativity and innovative ideas, combined with practicality, efficient use of advanced CAD techniques and effective project management.

Rail vehicle concept designs for CAF.
Concept design and animations for the Heathrow Express first-class interior refresh.
Our London Overground (East London Line) railcar interior design concept for Transport for London.
Exterior design concept and 3D CAD data for Bombardier's new Docklands Light Railway vehicles.
Our transport engineering design services include finite element stress-analysis techniques, ensuring structural performance of components and assemblies, with weight efficiency.


Design Triangle’s transport design consultants, designers, engineers and ergonomists generate innovative ideas and creative aesthetic concept designs for competitive new products.

Market research leads to understanding of the needs of customers and users. New rail vehicle concept designs and layouts are based firmly on the principles of ergonomics and human factors.

Our talented product designers generate new design concept ideas and create attractive styling railcar concept designs for interiors, exteriors, cabs and components.


Design Triangle specialises in rail vehicle interior design, including heavy rail, metros, trams and light rail vehicles.

We start our rail vehicle interior design projects with the passenger: ergonomics and human factors, including comfort, safety and ease of use, are crucial. Interior layouts are designed for speed of boarding and alighting, and for passenger flow within the railcar.

Design Triangle’s transport design consultants and industrial designers prepare appealing designs for seating, interior panel systems and lighting, including the specification of colours and finishes, while ergonomists ensure passenger comfort through ideal contours and dimensions for seating and handrails and appropriate anthropometric data.

Rail vehicle interior designs comply with Rail Vehicle Accessibility Regulations (RVAR), and our engineering team ensure manufacturability, durability and technical performance.


Design Triangle’s 20-year track record of train exterior design includes trams, light rail vehicles, metros, heavy rail vehicles, double-deck railcars and locomotives.

Our styling studio produces attractive and creative design solutions, including rail vehicle exterior design forms and details, branding design and the application of vehicle livery.

Our engineering CAD team develop the 3D forms in close cooperation with the designers. We have provided the 3D CAD tooling data for train exteriors in Hong Kong, London and Melbourne.


Realistic and accurate 3D visualisations for our rail projects allow the effective communication of ideas. These techniques reduce development times and speed the introduction of products to market.


We offer a wide range of rail interior 3D visualisation techniques, from manual sketches and hand-drawn illustrations through to 3D CAD models and animations. Photo-realistic CAD illustrations of rail vehicle interiors or exteriors include lighting effects, shadows, reflections and exterior environments. Virtual-reality rail interior visualisations are prepared as vehicle walk-throughs and fly-throughs.

Components and assemblies can be displayed as exploded views. Our rail interior visualisation techniques can be used to demonstrate operation, assembly or maintenance procedures.


Design Triangle provides transport design consultancy and rail vehicle engineering design consultancy for railway interiors, cabs, components and assemblies, from concept to prototype, including testing, manufacturing drawings and tooling data, ensuring compliance with railway regulations and standards, including RVAR and BS 6853.

Our engineering designers prepare construction concepts, including material and process selection and design for manufacture, assembly and installation. Alternative ideas are evaluated using decision-matrix techniques.

3D CAD modelling software includes Catia V5, and our rail vehicle engineering designers are proficient in 3D complex form development, as well as the design of mechanical components, assemblies and mouldings.

We provide in-house FE stress analysis of components and assemblies, material specifications, final manufacturing drawings and tooling data.

Prototypes manufactured by our engineers allow testing and approval of proposed designs.


  • Docklands Light Railway Capacity Upgrade

    Since opening in 1987, the Docklands Light Railway (DLR) has been central to the regeneration of east London. Now its significance is far greater than originally envisaged.

  • Bakerloo Line Extension, London

    The Bakerloo Line extension project is a proposed expansion of the London Underground Bakerloo line from its existing terminal station at Elephant & Castle to Lewisham, via Old Kent Road and New Cross Gate, in the UK.

  • Thomson-East Coast Line

    The Thomson-East Coast Line (TEL) is a new mass rapid transit (MRT) rail project under construction in Singapore. Announced by Land Transport Authority (LTA) in 2014, the project is a merger of two under-construction MRTs in the city namely the Thomson Line (TSL) and the Eastern Region Line (ERL).

  • Madrid Metro

    Spain's capital Madrid, home to over three million people, has one of the most extensive metro systems anywhere in the w

  • Heathrow Express

    The Heathrow Express is a high-speed service link offering the fastest journey time between Heathrow Airport and central London of 16 minutes and 21 minutes to Terminal 5.

Design Triangle
The Maltings
CB25 0HB
United Kingdom

Fax Number