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1、Jihchutolcom夏匕Trafficsafetyconsiderations么Functionalclassificationofthero晏旦wav友Projectedtrafficvolumeandcompomn么Requireddesignspeed丿MultimodalneedsofthesurroundingcommiunityTopographyofthesurroundinglandCapitalcostsforconstruction么AgencyfundingmechanismVehiclesizeandperformancecharacteristicsEdEnvir
2、onmentalconsiderations么Right-of-wayimpactandcosts5principaldesigncriteriaaffectinghighwaydesign1.TrafficvolumeLevelofservice(LOS)Level-of-ServiceAdescribesfreeflowoperations.Level-of-ServiceBdescribesstableflowoperations.Level-of-ServiceCdescribessaturatedflowoperations.Level-of-ServiceDdescribesforcedflowoperations.Anevaluationoftheestimatedvolumeoftrafficanticipatedtooccurduringthedesignyearisusefulindeterminingthenumberoftravellanesrequiredtoachievethedesiredlevelofserviceoperation.