The Société de transport de Lévis (STL) (Lévis Transit Corporation) is a public transportation agency created in 1980, operating mainly in Lévis on the south shore of the Saint Lawrence River, being the counterpart of the Réseau de transport de la Capitale (RTC) on the north side. STL offers connections between Lévis and Quebec City; RTC buses currently do not have any services to the south shore.
The STL serves a population of about 140,000 on a territory of 551,551 km² in the region of Chaudière-Appalaches. The corporation relies on 73 buses and 130 employees. In 2011, it served more than 3.5 million riders.