SmartMotorwaysDavidWhittle–31Oct2018Contents‐TheobjectivesofSmartMotorways‐InitialMetrics‐CaseStudiesandValueforMoney‐Linkingproblemsandsolutions‐DiscussionSmartMotorways–SceneSettingObjectives‐Smoothingtrafficflow‐Improvingjourneytimes‐Improvingreliability‐Improvingsafety‐Enhancedcustomerexperience‐Increasingcapacity‐Managingairquality‐Maximisingassetuse‐CostandbudgetcontrolDeliverymethods‐ControlledMotorways‐HardShoulderRunning(dynamic)‐AllLaneRunning‐VariableSpeedLimits(queueprotection)‐Operationalmanagement(trafficofficers)‐Technology–SmartinfrastructureConstraints‐Junctionspacing‐Spaceonrampsanddispersalnetwork‐Mainlineconstraints‐Environment‐BusinessCase‐ObsolescenceObjectivesofSmartMotorwaysinUK‐Increasecapacityandrelievecongestionwhilemaintainingsafety‐Helpmakejourneytimesmorereliable‐LesscostthantraditionalroadwideningschemesVariableSpeedLimitsLaneClosuresWarningSignsandInformationInitialMetrics22%improvement‐JourneyTimes0?fatalities‐Personalinjuryaccidentsmorethanhalved‐LowerseverityincidentsShorttermtrendsExtensivemonitoringequipmentforATMtrialinfluencingdriverbehaviourSafety‐Smartmotorwaysisacongestionmanagementscheme,notasafetyimprovementscheme‐However,byreducingcongestionandimprovingdriverbehaviouranALRschemeisexpectedtomaintaincurrentsafetyperformancelevelsRoadSafetyObjectiveAnALRschemewillsatisfytheminimumroadusersafetyobjectiveifitisdemonstratedforaperiodofthreeyearsafterbecomingfullyoperationalthat:•theaveragenumberofFatal&WeightedInjury(FWI)casualtiesperyearisnomorethanthesafetybaseline•therateofFWIcasualtiesperbillionvehiclemilesperannumisnomorethanthesafetybaseline•nopopulationofthecustomer(forexamplecardrivers,pedestrians,largegoodsvehicle(LGV)driversandmotorcyclists)isdisproportionatelyadverselyaffectedintermsofsafetyandrisktoeachpopulationremainstolerable.Source:HighwaysEnglandIAN161/15OvercomingtheperceptionandstakeholderconfidenceissuesinALR‐Moreworkneededtohelproadusersfeelsafer...
