 
 <prompt> Wetin be di system? Based on di last question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: Mexico City get the Sistema de Transporte Colectivo, wey be 225.9 km (140 mi) metro system, wey be the biggest for Latin America. Dem open the first parts for 1969 and e don expand reach 12 lines with 195 stations. The metro na one of the busiest for the world wey dey carry approximately 4.5 million people every day, wey only Moscow (7.5 million), Tokyo (5.9 million), and New York City (5.1 million) metro lines dey pass am. E dey heavily subsidized, and e get some of the lowest fares for the world, each trip dey cost 5.00 pesos from 05:00 am reach midnight. Some stations dey show pre-Columbian artifacts and architecture wey dem discover during the metro construction. However, the metro no cover reach half of the total urban area. The Metro stations dey different with icons and glyphs wey dem propose for people wey no fit read. The specific icons dem develop based on historical (characters, sites, pre-Hispanic motifs), linguistic, symbolic (glyphs) or location references and e don dey emulate for other transport options for the City and other Mexican cities. Mexico City na the only city for the world wey dey use the icon reference and e don turn popular culture trademark for the city. 