Promotora y Operadora de Infraestructura, S. A. B. de C. V. engages in the construction, operation, maintenance, financing, and promotion of toll roads and port projects in Mexico. The company is also involved in heavy construction projects, such as toll roads, ports, tunnels, dams, bridges, airports, and railways; industrial construction projects, including petrochemical, industrial, wastewater treatment, and power generating plants; and urban construction project comprising parking lots, museums, parks, education centers, buildings, water systems, public transportation systems, landfills, and hospitals. In addition, it manufactures asphalt concrete; basalt aggregates, such as ravel, sand, seal, ballast, hydraulic base, sub-base, and tepetate; central guard rails for roads and other precast concrete materials; and exploits stone aggregates. Further, the company provides services comprising minor maintenance and operation services for the toll roads; reception, storage, and shipment of goods; hauling or transfer of goods; loading and unloading from ship to yard and vice versa; loading and unloading from yard to ground transportation and vice versa; filling and emptying of containers; general cargo storage; mooring and unmooring of ropes; and handling, storage, and custody of foreign trade merchandise. The company was founded in 1969 and is based in Mexico City, Mexico.