Société de transport de Laval (STL) is the public transit system in the city of Laval, Quebec, Canada. It was founded in June 1971 as the Commission de transport de la Ville de Laval (CTL). STL came about in 1984. It serves the growing suburban areas of Laval, North of Montreal. A proposal to convert some of STL's most heavily used routes to electric trolleybuses was studied in detail in 2009–2010, funded jointly by STL and Hydro-Québec, but in autumn 2010 STL decided to postpone making a decision on trolleybuses until at least 2011, to allow further study of rechargeable electric buses first.