The Danish state railways, DSB, run Copenhagen's S-trains as well as the regional train traffic in Denmark.
DSB S-tog, which connects the metropolitan region, is not the only train services out of Copenhagen. DSB Regional Trains run routes out of the city, but not just on Zealand but also all the way around Denmark and abroad.
Since the opening of Storebæltsbroen, that connects Zealand and Funen, travel times have been reduced considerably, and it is now possible to travel to Århus, the second largest city in Denmark, in three hours.
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