The Rhone valley has always been a major axis for road and river traffic. Lyon has taken full advantage of this prime location by developing a network of exceptional infrastructures: Lyon Saint-Exupéry international airport with its TGV high-speed train station facilitating air-rail connections, the highly developed TGV network and freeway system. The urban transport network consists of over 100 bus lines, four metro lines, two funiculars, plus three tramway lines .