[UrbComp 2012] Where to Wait for a Taxi

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1、WheretoWaitforaTaxi?XudongZhengXiaoLiangKeXuStateKeyLaboratoryofStateKeyLaboratoryofStateKeyLaboratoryofSoftwareDevelopmentSoftwareDevelopmentSoftwareDevelopmentEnvironmentEnvironmentEnvironmentBeihangUniversityBeihangUniversityBeihangUniversityBeijing,ChinaB

2、eijing,ChinaBeijing,Chinazhengxudong@nlsde.liangxiao@nlsde.kexu@nlsde.buaa.edu.cnbuaa.edu.cnbuaa.edu.cnABSTRACTservicesforabout2,000,000passengerseveryday.Howev-Peopleoftenhavethedemandtodecidewheretowaitforaer,therearestillmanypeopleoftenannoyedwithwaitingtax

3、iinordertosavetheirtime.Inthispaper,toaddressthisfortaxis.Itisnotonlybecauseoftheimbalancebetweenproblem,weemploythenon-homogeneousPoissonprocesssupplyanddemand,butalsoduetothelackofthevacan-(NHPP)tomodelthebehaviorofvacanttaxis.Accordingtottaxisinformationpro

4、videdtopassengers.Forexample,thestatisticsoftheparkingtimeofvacanttaxisontheroadsifapersondoesnotknowthatthereisanotherroadnear-andthenumberofthevacanttaxisleavingtheroadsinhis-bywithmorevacanttaxispassingby,he/shewouldspendtory,wecanestimatethewaitingtimeatdi

5、fferenttimesonmuchmoretimeonwaitingforataxiincurrentlocation.roadsegments.Wealsoproposeanapproachtomakerecom-Experiencedpassengerscouldchooseabetterroadtowaitmendationsforpotentialpassengersonwheretowaitforafortaxisbasedonhistoricalexperiences.Butmorepeopletaxi

6、basedonourestimatedwaitingtime.Thenweevaluatehavelittleknowledgeaboutlikehowlongtheywouldtakeourapproachthroughtheexperimentsonsimulatedpassen-towaitfortaxishereorwhereisbettertowaitfortaxis,gersandactualtrajectoriesof12,000taxisinBeijing.Theespeciallyinsomest

7、rangeplacesforthem,whichmayaffectresultsshowthatourestimationisrelativelyaccurateandthetheirtravelsandschedulesverymuch.couldberegardedasareliableupperboundofthewaitingtimeinprobability.Andourrecommendationisatrade-Inthispaper,weproposeamethodtoestimatethewaiti

8、ngoffbetweenthewaitingtimeandwalkingdistance,whichtimeforavacanttaxiatagiventimeandplace,andthenwouldbringpracticalassistancetopotentialpassengers.Inprovideanapproachtomakerecommend