The 1Z sector of Zaragoza includes the following roads within the province of Zaragoza, with a total of around 400 kilometres of road network. The customer is a temporary joint venture, made up of three construction companies, which were awarded a concession contract. The scope of the work included: 1) Comprehensive conditioning of roads, by means of a new route. 2) Structural rehabilitation of road surfaces, by means of reinforcement. 3) Renovation of surfaces. 4) Road safety, actions with particular attention to high-accident (black spot) areas.