päälinjat
Päälinjat is a Finnish term used in transport and network planning to denote the backbone routes of a rail or road network. The concept refers to the principal corridors that connect major population centers and hubs, forming the core around which other lines function as feeders or secondary routes. The term is used in both railway planning and road network planning.
In railways, päälinjat typically exhibit higher traffic density and capacity, electrification, double tracks or more, higher
In planning practice, identifying päälinjat helps allocate funding, plan capacity expansions, and synchronize services. Upgrades, new
Although primarily used in Finnish transport discourse, the term reflects a common concept in many countries: