Colas Ltd | 33,476 followers on LinkedIn. Colas is a leader in designing, constructing & maintaining UK highways & infrastructure. | Colas is a world leader in the construction and maintenance of transport infrastructure. With a network spanning 50 countries and five continents, Colas constructs and maintains roads, highways, ports, logistics hubs and airport specialist surfacing. In the UK, Colas maintains Strategic Road Network projects on behalf of Highways England and many local authorities.