The Bordeaux tramway network consists of three lines serving the city of Bordeaux in Aquitaine in southwestern France. The first line of Bordeaux's modern tramway opened on 21 December 2003; further extensions have increased the route length to 66.1 kilometres (41.1 mi). The system is notable for using a ground-level power supply of the Alimentation par Sol (APS) system in the city centre. It has been operated by Keolis Bordeaux since 1 May 2009. The first tramway line of Bordeaux, with cars towed by horses, dates back to 1880.