tation.monformisthebus.Buseshavebeeninuseinmajorcitiessinceapproximately1900.Theyprovidetransportationserviceoncountlessroutesfromthecitycentertothesuburbs.Subwaysaremostlyfoundinlargecities.Thesubwayisanundergroundsystemofhighspeedtrains,whichmovemorequicklyandefficientlythanbuses.Andtheywilldeliveryoutowithinwalkingdistanceofalmostanyplaceinthecity.39Cabsaremoreexpensivethanbusesorsubways,buttheywilldeliveryoutotheexactlocationyouwantintheshortesttimepossible.40Andasanaddedattraction,manycabdriverswilltellyoustoriesabouttheiradventuresoreventhedetailsoftheirlifestories.Ifyouevervisitamajorcityinanothercountry,youwillprobablyhavenotroublegettingaround.However,nomatterwhatformoftransportationyouadopt,etotheconclusionthatthemostinexpensiveandreliableformoftransportationwillbeyourowntwolegs.
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