taketheirdriverlesscarstoanappointmentandsettheemptyvehicletocirclethebuildingtoavoidpayingforparking.Insteadofwalkingafewblockstopickupachildorthedrycleaning,theysendtheself-drivingminibus.Theconvenienceevenleadsfewerpeopletotakepublictransport—anunwelcomesideeffectresearchershavealreadyfoundinride-hailing叫(车)...