Onaverage,60%oftheworld'speopleandcargoistransportedbyvehiclethatmoveonrubbertiresoverroadwaysofvariousconstruction,composition,andquality.Thenumberofsuchvehicles,includingautomobilesandallmanneroftrucks,increasescontinuallywithagrowingpositiveimpactonaccessibilityandagrowingneg