교차로 기하 구조 정보 (IntersectionGeometry)

IntersectionGeometry ::= SEQUENCE {
   name        DescriptiveName OPTIONAL, 
                            -- For debug use only
   id          IntersectionReferenceID,  
                            -- A globally unique value set, 
                            -- consisting of a regionID and 
                            -- intersection ID assignment
   revision    MsgCount,    

   -- Required default values about lane descriptions follow
   refPoint    Position3D,  -- The reference from which subsequent 
                            -- data points are offset until a new
                            -- point is used. 
   laneWidth   LaneWidth OPTIONAL,   
                            -- Reference width used by all subsequent 
                            -- lanes unless a new width is given  
   speedLimits SpeedLimitList OPTIONAL, 
                            -- Reference regulatory speed limits
                            -- used by all subsequent 
                            -- lanes unless a new speed is given 
                            -- See Section 11 for converting and 
                            -- translating speed expressed in mph 
                            -- into units of m/s
   -- Complete details regarding each lane type in this intersection
   laneSet     LaneList,    -- Data about one or more lanes
                            -- (all lane data is found here)
   
   -- Data describing how to use and request preemption and
   -- priority services from this intersection (if supported)
   -- NOTE Additonal data may be added in the next release of the 
   -- standard at this point to handle this concept
   preemptPriorityData PreemptPriorityList OPTIONAL, 
                           -- data about one or more regional
                           -- preempt or priority zones 
   
   regional     SEQUENCE (SIZE(1..4)) OF 
                RegionalExtension {{Reg-IntersectionGeometry}} OPTIONAL,
   ...,
   roadAuthorityID			RoadAuthorityID		OPTIONAL
   -- Mandatory if roadRegulatorID is set to 0   
   }