since 24 september 2000, the series 310 runs the intercityslovenija (ics) service, linking the major cities of slovenia in one line: koper (only in summer), ljubljana, zidani most, celje and maribor, with a frequent service that acts as a high-speed shuttle. until april 2008, once per day the route from maribor to ljubljana was extended as international train to venice via monfalcone serving trieste.