Promotora y Operadora de Infraestructura, S. A. B. de C. V., a company founded in 1969 and based in Mexico City, Mexico, specializes in the comprehensive development of infrastructure projects throughout the country. Its activities span the entire lifecycle of these initiatives, including financing, planning, construction, operation, and maintenance. The firm undertakes a wide array of projects, encompassing significant civil engineering endeavors like toll roads, ports, tunnels, dams, bridges, airports, and railway systems. It also constructs industrial facilities, such as petrochemical plants, general manufacturing sites, wastewater treatment centers, and power generation stations. Furthermore, its urban development portfolio includes parking facilities, museums, parks, educational institutions, various buildings, water supply systems, public transportation networks, landfills, and hospitals. Beyond construction, the company is a producer of key building materials. This includes different types of asphalt concrete; basalt aggregates such as gravel, sand, seal, ballast, hydraulic base, sub-base, and tepetate; along with precast concrete items like central guard rails for roads. It also extracts stone aggregates. Additionally, the company provides a range of logistical and port services. These offerings include the reception, storage, and shipment of goods; transportation and transfer of merchandise; loading and unloading of vessels; filling and emptying of containers; general cargo warehousing; and mooring and unmooring services for ships. It also manages the handling, storage, and custody of foreign trade goods.