SL, Storstockholms Lokaltrafik, runs public transport in Stockholm, and its Pendeltåg commuter trains use this short jingle before onboard and platform announcements. The chime became familiar to millions of passengers as part of the daily rhythm of travelling across the Swedish capital and its suburbs. Clips of the sound spread online through transit enthusiast videos, travel vlogs and Swedish social media posts, where it is shared as a recognisable piece of Stockholm life. It remains popular because few other sounds sum up the Pendeltåg experience so quickly.