On Tartu's wikitravel page it states
Direct trains between Tartu and Riga are scheduled to resume after the completion of track construction.
I will be in Riga in 2 weeks and I was hoping to visit Tartu for a day trip. Since wikitravel is not always up to date, I was hoping someone here has any info about the train line Riga - Tartu. When will it be operational? (Or is it already?)