Colas is a company that specializes in the construction and maintenance of road, air, rail, and maritime transport infrastructure. Its activities include the construction and maintenance of roads, highways, airport runways, ports, industrial and logistics infrastructure, bus and tramways, urban transport, recreational facilities, bicycle paths, etc. The company is also engaged in the manufacturing and recycling of construction materials, including aggregates, asphalt mixes, and ready-to-use concrete via a network of quarries and emulsion, asphalt, and concrete plants.