VR commuter rail lines

The Helsinki commuter rail system comprises four local and four regional services, each of which are identified by letters of the alphabet.

This was originally inspired by the Copenhagen S-train system.

Unlike Copenhagen, which maintains a strict alphabetical order, letters of Helsinki commuter rail services are often assigned on the basis of mnemonics, such as E for Espoo and K for Kerava, with care taken to ensure that the original letters did not sound or look similar, to avoid confusion.

Commuter train services operate on four railway lines, radiating from the Helsinki Central Station: The VR commuter rail system consists of three local and four interurban services: Frequencies are for off-peak only (Monday-Saturday).

These include the lines to Siuntio, Kouvola and Tampere.