Baltijas Tranzīta Serviss (BTS), a Riga Port Group company, is the largest private railway operator in Latvia. BTS provides rail transport services between the most important railway stations and port cities - Riga and Ventspils. BTS cooperates with the Belarusian railway company to receive cargo directly at the Latvian-Belarusian border. BTS has a fleet of 12 locomotives, including two shunting locomotives and eight diesel locomotives. BTS has an annual freight turnover of 4 million tons.