In 2018, the Madrid metropolitan area held the largest urban public transport traffic in Spain, amounting to approximately *** million vehicles-kilometer. Barcelona and Valencia ranked second and third, respectively.
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Observatorio de la Movilidad Metropolitana. (October 23, 2020). Urban public transport traffic in Spain in 2018, by metropolitan area (in million vehicles-km) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved August 04, 2026, from /statistics/774929/vehicles-by-kilometer-of-the-transport-urban-by-area-metropolitan-spain/
Observatorio de la Movilidad Metropolitana. "Urban public transport traffic in Spain in 2018, by metropolitan area (in million vehicles-km)." Chart. October 23, 2020. ÌÇÐÄÆƽâ°æ. Accessed August 04, 2026. /statistics/774929/vehicles-by-kilometer-of-the-transport-urban-by-area-metropolitan-spain/
Observatorio de la Movilidad Metropolitana. (2020). Urban public transport traffic in Spain in 2018, by metropolitan area (in million vehicles-km). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: August 04, 2026. /statistics/774929/vehicles-by-kilometer-of-the-transport-urban-by-area-metropolitan-spain/
Observatorio de la Movilidad Metropolitana. "Urban Public Transport Traffic in Spain in 2018, by Metropolitan Area (in Million Vehicles-km)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 23 Oct 2020, /statistics/774929/vehicles-by-kilometer-of-the-transport-urban-by-area-metropolitan-spain/
Observatorio de la Movilidad Metropolitana, Urban public transport traffic in Spain in 2018, by metropolitan area (in million vehicles-km) ÌÇÐÄÆƽâ°æ, /statistics/774929/vehicles-by-kilometer-of-the-transport-urban-by-area-metropolitan-spain/ (last visited August 04, 2026)
Urban public transport traffic in Spain in 2018, by metropolitan area (in million vehicles-km) [Graph], Observatorio de la Movilidad Metropolitana, October 23, 2020. [Online]. Available: /statistics/774929/vehicles-by-kilometer-of-the-transport-urban-by-area-metropolitan-spain/
