The Linha do Norte (North Line) is Portugal's main north–south rail corridor, linking Lisbon and Porto and carrying the country's busiest intercity and commuter trains. Disruptions on the North Line can affect long-distance schedules and regional services, so passengers should follow CP - Comboios de Portugal updates for alternative routes and timing.

CP is the Portuguese national rail operator (Comboios de Portugal), a state-owned company that runs most passenger train services. The Council of Ministers authorised CP to buy up to 20 high-speed multiple units (12 firm orders with an option for 8) to prepare it for a leading role in high‑speed services.

An Alfa Pendular (high-speed train service) is the fastest long-distance passenger train run by CP (Comboios de Portugal). These tilting trains reach up to about 220 km/h and link major cities on the north–south corridor (for example Lisbon and Porto, with journeys around 2h45), so check CP notices when services are suspended during storms.