过程中文件二-written

General设：要设计的路在加州与其他州相交的地方ThisisaruralhighwayinSanJose,locatedat37°20′07″N121°53′31″W.Itisatwolaneruralhighway(Minorarterial).Thetotallengthoftheroadis1196,passingroundfromnorthtosouth.Therearetwocurvesalongtheroad.Thedesignspeedis35 /h.ThegivendrawingsareANSIA(11”X17”)withascaleof1/32”=1’(1:384).Theroadlocatedinafoothillsettingwithlowdipsandsubduedtopography.Theslopeisnomorethanx对于道路来说，高差小是较为有利的一个条件，它能提供一个较为平稳的地SubtropicalMediterraneanclimate.(CentralCoastregionofthenineclimateSanJosehas300+daysofsunshine,a agedailyhightemperatureof73°F(23°C)annuallyandalightrainfall.ScopeofWehavexxroadstation, x x.Thetotallength Residentsintheexistingdevelopment:Theyhavethreetrafficmode,bycar,bybicycleoronfoot.Wecanimplyfromthetopographythatthemaintrafficmodesaredriving出行为主。因此，设计了自行车道，以及横道线，提供住在那里的村民出入便Vehiclespassingby:Wesupposedthat%aretrucks,%arebusesand%arepassengerAsshowninMailertheexpectedADTis3400vpd.所以鉴于日交通量较少，以及路宽的限定，只设计了单车道。Levelof认为该道路注重的是车辆的通行能力。因而服务水平定为LOSBDesign35因为曲线的最小半径为…，而通过规范的查阅与计算，发现满足的速度要求庄，考虑到驾驶以及周围出行村名的安全，所以设定了一个较小的设计速度。alignmentGeometricLeftshoulder Leftlane Rightlane Rightshoulder SightStopsightdistance:Passingsightdistance:LandPavementForasphaltshoulders,thethicknessoftheasphaltlayer(notincludingnonstructuralwearingsurface)shouldnotbelessthan0.35footorthethicknessoftheasphaltlayeroftheadjacenttrafficlane,whicheverisless.Forconcreteshoulders,apavementstructureof0.70footundoweledjointedplainconcretepavement(0.85footinHighMountainandHighDesertclimateregions)overaggregatebaseissufficienttomeettherequirementoftheTInotexceeding9.0andprovideadequatestructureformaintenanceequipmentandtemporarytrafficdetours.ternateshoulderdesignistotrthesurfacecoursefromthesurfacecoursethicknessoftheadjacenttrafficlanetonolessthan0.60foot(0.75footinHighMountainandHighDesertclimateregions)forconcreteand0.35footforasphaltattheedgeofshoulder(seeFigure613.5B).只有这个还是shoulder的TrafficyieldstopMiscellaneousWarningInterstateRouteSign(因为周围比较荒凉、所以假定这个地区属于跨州地区speedlimitIllustrationofDirectionalCost表HowthedesignmeetsnciesumBikeExpected3400RuralRuralPostedSpeed55mphLandAccessWebelievetheroadwaymainlyservestheresidentsintheexistingdevelopment.So。BenefitoftheWehaveexperimentedwithseveralprojectsandfinallywechooseitforsomeThedesi