Aurizon Holdings Limited is engaged in rail-based transport business. The Company acts as a heavy haul freight railway operator and rail transporter of coal from mine to port for export markets, and also engages in bulk general and containerized freight businesses and rail services activities. Its segments include Network, Commercial & Marketing, Operations and Other. The Network segment provides access to, operation and management of the Central Queensland Coal Rail Network. The Network segment is also engaged in the provision of overhaul and maintenance of rail network assets. The Commercial & Marketing segment is responsible for commercial negotiation of sales contracts and customer relationship management. The Operations segment is responsible for the national delivery of coal, iron ore, bulk and intermodal haulage services. It also includes yard operations, fleet maintenance, operations, engineering and technology, engineering program delivery and safety, health and environment.