Given the task definition and input, reply with output. In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Article: TheUnitedStateshasaround475,000schoolbuses.Eachdaytheycarrymorethan25million children,halfofalltheschoolchildreninthecountry. Thesebuses,onaverage,use4litersofdiesel fueltotravellessthan16kilometers. When theschoolyearbeganlastfall,dieselaveraged55centsaliternationally.Thepricenearlydoubledby theendofschool inJune. BobRileyisthespokesmanfortheAmericanSchoolBusCouncil.Hesaysfuelpricesnegotiated for schools arenot lower thanothers have to pay. Asaresult,schoolsarelookingfor waystoreducetransportationcosts.Busroutesarebeing redrawnor,insomecases,canceled.Someareas arebuyingbusesthatuse naturalgas orother alternativefuels. Otherstepsincludefewerfieldtrips andlesstravel bysports teams.Someschool districtsmayend any busservicenotrequiredby law. Studiesshowthatschoolbusesarethesafestform oftransportationtoandfrom school. The AmericanSchoolBus Councilsayscutsinbus serviceare badfor childrenandpossiblythe environment.Itsaysremovingbusesfromtheroadwillmeananincreaseinothervehiclestransporting students. Spokesman Bob Riley saysanotherconcern is thatreducing busservicemightreduce attendance. It couldalso getmorechildren to walkor bicycle to school.That wouldsurely makepeople happy attheNationalCenterforSafeRoutestoSchool.Morekidswalkingorbikingsafelytoschoolisthe aimofa3-year-oldfederal program,partofaninternationalmovement.Thegoalis toincreasephysical activity and reduce air pollution.
Answer: Trafficjams willbereducedduringrushhour.
Whatistheadvantage ofreducingschoolbusserviceaccordingto thepassage?