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Chapter4A.ConceptofAccessManagement3.AccessManagementandMultimodalNeeds-Acomprehensiveaccessmanagementprogramsupportssafeandefficientoperationsforallmodesoftransportation(includingvehicles,pedestrians,bicyclists,etc.).4.ImportanceofAccessManagement-Thetransportationandlandusecyclebeginsasmajorimprovementsintheroadwaysystemchangetheaccessibilityofland.Improvedaccessibilitycauseslandvaluestoincreaseandstimulatesrealestatedevelopment.(Figure1-2).-Aneffectiveaccessmanagementprogramcanreducecrashesasmuchas50%,increaseroadwaycapacityby23%to45%,andreducetraveltimeanddelayasmuchas40%to60%.-Bymanagingroadwayaccess,governmentagenciescanextendthelifeofroadsandhigh-ways,increasepublicsafety,reducetrafficcongestion,andimprovetheappearanceandqualityofthebuiltenvironment.5.BenefitsofAccessManagement-Motorists:(1)Facefewerdecisionpointsandtrafficconflicts,whichsimplifiesthedrivingtaskandincreasesdriversafety,(2)Experiencefewertrafficdelaysandarrivemorequicklyattheirdestinations.-Cyclists:(1)Facefewerdecisionpointsandconflictswithtraffic,whichsimplifiesthecyclingtaskandincreasessafetyforcyclists,(2)Benefitfrommorepredictablemotoristtravelpatterns,(3)Canchoosealternativetravelroutesaslocalsupportingroadwaysystemsaredeveloped.-Pedestrians:(1)Facefewerandlessfrequentaccesspointswheremotoristsenterandexittheroadway,therebymakingitsafertowalkalongmajorroadways,(2)Canusemediansasarefugewhencrossingseverallanesoftraffic.6.AccessManagementandGeometricDesign-Geometricdesignfeatures,suchasinterchanges,frontageroads,medians,medianopenings,auxiliarylanes,drivewaydesign,andintersectionchannelizationareusedtomanageaccessandvehicularturningmovements.B.SafetyEffectsofAccessManagement(Fig.1-6)-Mediansimprovepedestriansafety:Properlydesignedmedianscanprovidearefugeforpedestriansastheycrossaroadway.(Fig.2-3)-Effectsofspecifictechniques:(Table2-5)C.CaseStudyD.PrinciplesofAccessManagementLocatesignalstofavorthroughmovements-Long,uniformspacingofintersectionsandsignalsonmajor
