How to ride MTS Trolley and Bus?San Diego MTS is the public transit service provider for Central, South, Northeast and Southeast San Diego County.You can ride MTS trolley and bus with PRONTO card, app or buy a ticket.When you go to the trolley station:Tap your PRONTO card to the machine before ride.When you go to the bus station:Tap a PRONTO card to the machine inside a bus.Enjoy your San Diego life♫ #sandiego #california #studyabroad #studyabroadlife #qinternationalschool #esl #americanenglish

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