Citieshavemanypeople.Theyneedtomovearound.Carscausetrafficjams.Trafficjamswastetime.Theypollutetheair.Citiesneedabetterway.Citytrainsareagoodsolution.Theyarealsocalledurbanrailtransit.Thisincludessubwaysandlightrail.Theycarrymanypeople.Theyarefast.Theydonotgetstuckintraffic.

Manycitiesbuildtrainsystems.ThefirstcitytrainwasinLondon.Itopenedlongago.Nowmanybigcitieshavethem.Tokyohasabigsystem.NewYorkhasonetoo.Shanghai'ssystemisverylarge.Thesesystemshelppeopletraveleveryday.

Citytrainshavemanybenefits.Theyreducecarsontheroad.Fewercarsmeanlesstraffic.Theyhelptheenvironment.Trainsuseelectricity.Theydonotburngasolinelikecars.Thismakestheaircleaner.Trainsarealsosafe.Theyhavetheirowntracks.Theydonotcrashwithcars.

Peoplesavemoneyusingtrains.Drivingacarisexpensive.Youmustpayforthecar.Youmustpayforfuel.Youmustpayforparking.Trainscostlesspertrip.Atrainticketischeap.Manypeoplecanaffordit.

Trainsarereliable.Theyrunonaschedule.Youcanplanyourtrip.Youknowwhenyouwillarrive.Acartripisdifferent.Atrafficjamcanmakeyoulate.Trainsaregoodforgoingtowork.Theyaregoodforgoingtoschool.

Buildingatrainsystemisabigjob.Itcostsalotofmoney.Ittakesmanyyears.Workersdigtunnelsunderground.Theybuildelevatedtracks.Theylaydownrails.Theysetuppowerlines.Theybuildstations.Stationsarewherepeoplegetonandoff.

Atrainsystemhasmanyparts.Thetrainsthemselvesareimportant.Theyhavemanycars.Eachcarhasmanyseats.Theyalsohavespaceforpeopletostand.Theyhavedoorsforgettingonandoff.Theyhavewindows.

Thecontrolsystemisimportant.Itmakesthetrainssafe.Itcontrolsthesignals.Itmakessuretrainsdonothiteachother.Modernsystemsusecomputers.Computerswatchthetrains.Theycontrolthespeed.Theycontrolthedistancebetweentrains.

Peopleneedtobuytickets.Thereareticketmachines.Youcanusecash.Youcanuseacard.Manysystemsuseasmartcard.Youtapthecardtoenter.Youtapagainwhenyouleave.Thesystemcalculatesthefare.Itdeductsmoneyfromthecard.

Trainsystemscreatejobs.Peopledrivethetrains.Peoplemaintainthetracks.Peoplecleanthestations.Peopleworkincontrolcenters.Peopleselltickets.Manyjobsareneeded.

Someproblemsexist.Buildingthesystemisdisruptive.Roadsmustbeclosed.Noiseisaproblemfornearbyhomes.Thecostisveryhigh.Somecitiescannotaffordit.

Crowdingisanotherproblem.Duringrushhour,trainsareveryfull.Peoplestandveryclose.Thisisuncomfortableforsome.

Safetyisalwaysimportant.Stationshavesecuritycameras.Policeofficerspatrolthestations.Thereareemergencybuttons.Peoplecancallforhelp.

Trainsystemsarealwaysimproving.Newtrainsarefaster.Theyaremorecomfortable.Theyuselessenergy.Newsignalingsystemsallowmoretrainstorun.Thisreduceswaitingtime.

Somesystemsrunwithoutadriver.Automatedtrainsarebecomingcommon.Theyarecontrolledbycomputers.Theyareveryprecise.Theycanrunveryfrequently.

Citytrainsconnectplaces.Theyconnecthomesandworkplaces.Theyconnectshoppingcenters.Theyconnectschoolsandhospitals.Theyconnectairportsandtrainstations.Theymakethecityoneconnectedplace.

Agoodtrainsystemhelpsacity'seconomy.Ithelpspeoplegettojobs.Ithelpsbusinessesfindworkers.Itmakesthecitymoreattractive.Peoplewanttoliveincitieswithgoodtransport.

Landvalueschangenearstations.Placesnearstationsbecomemorevaluable.Peoplewanttolivethere.Businesseswanttoopenthere.Newbuildingsareconstructed.Thisiscalledtransit-orienteddevelopment.

Citytrainsaregoodforsociety.Theyareforeveryone.Richpeopleusethem.Poorpeopleusethem.Theyareasharedspace.Theyreducesocialinequality.

Theyarealsoefficientinlanduse.Atrainlinecarriesthousandsofpeople.Aroadforcarswouldneedmuchmorespace.Citieshavelimitedspace.Usingspacewiselyisimportant.

Thefutureofcitytrainsisbright.Morecitieswillbuildthem.Existingsystemswillexpand.Technologywillmakethembetter.Theywillbemoreintegratedwithothertransport.Forexample,peoplecanrideabiketothestation.Theycantakethetrain.Thentheycantakeabustotheirfinalstop.Thisiscalledamulti-modaljourney.

Inconclusion,citytrainsareveryimportant.Theysolvemanyurbanproblems.Theyhelpwithtraffic.Theyhelptheenvironment.Theyhelptheeconomy.Theyareakeypartofmoderncitylife.Everymajorcityshouldhaveagoodtrainsystem.Itisasignofadevelopedcity.Itmakeslifebetterforeveryone.