北美道路照明标准

《北美道路照明标准》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、22RoadwayLightingFixedlightingofpublicwaysforbothvehiclesandpedestrianscancreateanighttimeenvironmentinwhichpeoplecanseecomfortablyandcanquicklyandaccuratelyidentifyobjectsontheroadwaybeingtraveled.Roadwaylightingcanimprovetrafficsafety,achieveefficienttrafficmovement,andp

2、romotethegeneraluseofthefacilityduringdarknessandunderawidevarietyofweatherconditions.Asasupplementtovehicularheadlightillumination,fixedlightingcanenablethemotoristtoseedetailsmoredistinctly,locatethemwithgreatercertainty,andreactsafelytoroadwayandtrafficconditionspresent

3、onorneartheroadwayfacility.Pedestriansmustbeabletoseewithsufficientdetailtoreadilynegotiatethepedestrianfacilityandrecognizethepresenceofotherpedestrians,vehicles,andobjectsintheirvicinity.Whenfixed-lightingprinciplesandtechniquesareproperlyapplied,thevisibilityprovidedont

4、hesepublicwayscanprovideeconomicandsocialbenefitstothepublic,including:òReductioninnighttimeaccidentsòAidtopoliceprotectionòFacilitationoftrafficflowòPromotionofbusinessandindustryduringnighttimehoursòInspirationforcommunityspiritandgrowthThischapterconsidersonlyfixedlight

5、ingforthedifferentkindsofpublicroads,pedestrianwalkwaysandbikewaysofaqualityconsideredappropriatetomodernrequirementsfornightuse.SeeChapter23,TransportationLighting,forinformationonvehicleheadlighting.CLASSIFICATIONDEFINITIONS1Roadway:PedestrianWalkwayandBikewayClassificat

6、ionsFreeway.Adividedmajorroadwaywithfullcontrolofaccessandwithnocrossingsatgrade.Thisdefinitionappliestotollaswellasnontollroadsasfollows:FreewayA.Roadwayswithvisualcomplexityandhightrafficvolumes.Usuallythistypeoffreewayisfoundinmajormetropolitanareasinornearthecentralcor

7、eandoperatesthroughmuchoftheearlyeveninghoursofdarknessatorneardesigncapacity.FreewayB.Allotherdividedroadwayswithfullcontrolofaccesswherelightingisneeded.Expressway.Adividedmajorroadwayforthroughtrafficwithpartialcontrolofaccessandgenerallywithinterchangesatmajorcrossroad

8、s.Expresswaysfornoncommercialtrafficwithinparkareasaregenerallyknownasparkways.Major.Thep