Colas SA designs, builds, and maintains transport infrastructure and sustainable development projects. The company provides products and services related to the design, construction, maintenance, and recycling of transport infrastructure, including roads, railways, airports, ports, and public transport systems. It offers sustainable development solutions such as eco-alternatives, resilient infrastructure, and circular economy services through material recovery and recycling platforms. The company delivers infrastructure lifecycle management services, including inspection, testing systems, and digital solutions such as BIM for digital twins, as well as performance contracts for sustainable infrastructure management and solutions for traffic regulation and new infrastructure features. It supports projects at every stage, including structuring, financing, design, construction, and maintenance, and implements biodiversity strategies and climate change mitigation and adaptation solutions. The company serves clients in the transport infrastructure sector, including road, airport, port, railway, and public transport industries, as well as engineering firms, partners, suppliers, and local communities involved in mobility infrastructure and sustainable development projects. The company was founded in 1929 and is based in Paris, France.