 The airport is the third most active in the country (after Mexico City and Cancún) with direct flights to many Mexican and American cities.Within the city itself, there are many forms of public transportation.The Guadalajara light rail/metro system, named SITEUR (Sistema de Tren Eléctrico Urbano), Spanish for Urban Electrical Train System, provides rapid transit service within Guadalajara and the neighboring municipalities of Zapopan and Tlaquepaque.