there is a further challenge for the operators: persuading the people to use the system. compared to the buses, tickets are not particularly cheap. in order to pay the debt, the operators need to aim for a minimum of 680000 trips a day which presents a real marketing challenge.popularinvestors have withdraw funds from the projectthe underground section of the network still needs to be finishedthe first part of an ambitious plan:a further 240 km of track, including an underground portion, is already in the pipeline
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