Efficient and timely solutions including multi-lane highways, toll roads, high-occupancy vehicle lanes, freeways, etc.

Large experience in countries that have experienced a fast railway infrastructure development in the last decades.

Design of highway bridges including braided ramps, connectors, overpasses and underpasses.

Wide experience in the design of the most adequate drainage solution complying with applicable requirements.


Our team has successfully carried out projects all over the world. Our knowledge involves international and regional technical requirements that guarantee quality and accuracy in every project we develop.

Detailed design projects

We provide solutions to all range of projects, regardless of the complexity.

Preliminary studies

We assess the feasibility of new proposals.

Project supervision

We supervise any phase of a transportation engineering project.

Associated Infrastructure

Minor roads, drainage, tunnels or access roads to solar and wind farms are also part of our work and knowledge.


Valuable resources

As a globally-oriented company, our work is grounded on innovation and adaptability and we have the experience and the resources to cooperate with large and diverse teams around the world.

Latest blog/news

¡Bienvenidos a nuestra nueva página web! Una web más gráfica y dinámica en la que podréis encontrar toda la información sobre nuestra empresa, los trabajos que hemos realizados hasta la fecha y todo aquello en lo que Spiral puede ayudarte. En este blog os iremos......