The problems related to this type of operation are

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)Theproblemsrelatedtothis typeofoperationarecross-ingsatintersections,whichoftenhavetobecontrolledbyspecialsignals,andthelocationoflightrailstops,whichrequirewiderright-of-way.Thiscanberesolvedbyproviding
39P-24.Medianlight railright-of-way(ROW)(Cologne)P-27.MedianROWwithflowersinacentralurbanarea(Rotterdam)P-25.MedianlightrailROWonP-28.Trackreconstructionfromabridge(RiverRhein,Cologne)pavementintothemedianprivateROW(Bielefeld)P-26.Lightrailinthemedian(Wuppertal)P-29.Median ROWprotectedbyconcretebarriers(Stuttgart)
40aminimumadditionalwidthandstaggeringthestopsforthetwodirectionsalongthelinewithamildScurveinthetrackbetweenthem.Severalcitiesarepresentlyengagedinprovidingthisprivateright-of-waywithinexistingstreets.Insteadofaneight-lanearterialwithparkingon thesidesandtracksinthemiddleofthepavement,thereconstructedstreeteliminatesparking,introducesspecial signalsforleftturningtrafficatareducednumberofintersections,andprovidesareservedright-of-wayforlightrailvehicles.BielefeldandHannover,forexample,arenowcarryingoutsuchreconstruction.Itshouldbenotedherethatprovisionofseparaterights-of-wayforlightrailinstreetsandelsewhereisabasic,generallyacceptedpolicyinallstudiedcities.Transit,consideredvitalforthecity,mustrepresentatransportationsystemofferingafastandreliableservice.Thiscanbeachievedonlythroughseparationoftransitfromothertrafficwhereverthatisreasonablypossible.Benefit/costanalysesarethereforenotperformedforindividualsectionsoflines;somesectionswithheadwaysaslongas7.5-15minutesarealsoplacedonprivaterights-of-wayaspartsofthebasicrailtransitnetworkimportantforthesystemperformance.-Buslines,carryinggenerallylighterpassengervolumes,havelessseparation,althoughanincreasingnumberofbuslanesarebeingintroducedincongestedareas.CoLateral PrivateRight-of-Way.Inawaysimilartothecentralreservation,itispossibletoprovidereservedrights-of-wayforlightrailvehiclesononesideofstreets,betweencurbandsidewalk,usuallywithinagreenstrip.Brussels,Antwerp,Hannover, Belgrade,Stuttgart,andanumberofothercitieshaveutilizedthisdesignonmanyoftheirlines,includingsomeveryrecentconstructions.
41newlightrail line(Rotterdam)P-31.Laterallight railROW(Belgrade)P-32.Lightrailinapark:anattractivealignment(Belgrade)P-33.Transportationwaythroughgreenareaswithminimumintrusion(Belgrade)P-34.High-speedalign-mentthroughgreenarea(Cologne)
42d.AlignmentThroughParks.Raillinesthroughparksandpark-likeareashavealsobeenusedformanyyearswithverygoodresults.Sincetherailsdonotsignificantlyaltertheparkareatheyarepassingthrough,theenvironmentalharmcausedbythemisnegligible.Thereforetheyaremuchmorereadilyacceptedinsuchoperationthantheconstructionofahighway.

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