Colas S.A. is a global leader in the construction and upkeep of transportation infrastructure. The company's operations are divided into three principal divisions: Roads, Construction Materials, and Railways. Within its Roads division, Colas builds and maintains a wide array of infrastructure, including major roadways and highways, airport runways and aprons, maritime ports, industrial complexes, logistical and commercial facilities, urban streets, public transport routes with dedicated lanes, leisure areas, and environmental protection projects. They also undertake building renovation, demolition, and deconstruction, alongside minor civil engineering and drainage initiatives. The Construction Materials segment focuses on the production and recycling of essential building components like aggregates, emulsions, binders, asphalt mixtures, ready-mix concrete, and bitumen. The Railways segment encompasses the design and engineering of major railway projects. Its services include the construction, refurbishment, and ongoing maintenance of diverse rail networks, spanning high-speed and conventional lines, subways, and tramways. This involves track laying and upkeep, electrification, installation of signaling and telecommunication systems, safety equipment, ventilation, and fire detection/protection. Specialized railway projects, such as bridge cranes, unique branch lines, and the repair of railway tunnels, are also part of their expertise. Beyond these core areas, Colas also specializes in laying and maintaining pipelines for water and energy transport. This extends to constructing complete gas compression stations, undertaking minor civil engineering tasks, and providing various industrial services. Furthermore, the company manufactures, installs, and maintains road safety and signaling equipment, manages traffic flow, and distributes bitumen. Established in 1929, Colas S.A. is headquartered in Paris, France, and operates as a subsidiary of Bouygues S.A.