Tallinna Linnatranspordi AS Tallinna Linnatranspordi AS (TLT) is an Estonian transportation company. (TLT) is a transportation company owned by the city of Tallinn Tallinn, the largest city and capital of Estonia (population 440 000). , Estonia. The company provides bus, trolleybus, and tram services in Tallinn Tallinn, the largest city and capital of Estonia (population 440 000). . It was founded in 2012.