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SAE J2735-Draft-Rev29 [issued: 12-11-08]
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55 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
-- data about one or more approaches
-- (lane data is found here)
preemptZones SEQUENCE (SIZE(1..32)) OF
SignalControlZone OPTIONAL,
-- data about one or more
-- preempt zones
priorityZones SEQUENCE (SIZE(1..32)) OF
SignalControlZone OPTIONAL,
-- data about one or more
-- priority zones
...
}
XML Representation:
<xs:complexType name="Intersection" >
<xs:sequence>
<xs:element name="name" type="DescriptiveName" minOccurs="0"/>
<xs:element name="id" type="IntersectionID" />
<!-- a gloablly unique value,
the upper bytes of which may not
be sent if the context is known -->
<xs:element name="refPoint" type="ReferencePoint" minOccurs="0"/>
<!-- the reference from which subsequent
data points are offset untill a new
point is used. -->
<xs:element name="refInterNum" type="IntersectionID" minOccurs="0"/>
<!-- present only if this is a computed
intersection instance -->
<xs:element name="orientation" type="Heading" minOccurs="0"/>
<!-- present only if this is a computed
intersection instance -->
<xs:element name="laneWidth" type="LaneWidth" minOccurs="0"/>
<!-- reference width used by subsequent
lanes until a new width is given -->
<xs:element name="type" type="IntersectionStatusObject" minOccurs="0"/>
<!-- data about the intersection type -->
<xs:element name="approaches" >
<xs:complexType>
<xs:sequence minOccurs="1" maxOccurs="32">
<xs:element name="approache" type="ApproachObject" />
<!-- data about one or more approaches (lane data is found here) -->
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="preemptZones" minOccurs="0">
<xs:complexType>
<xs:sequence minOccurs="1" maxOccurs="32">
<xs:element name="preemptZone" type="SignalControlZone" />
<!-- data about one or more preempt zones -->
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="priorityZones" minOccurs="0">
<xs:complexType>
<xs:sequence minOccurs="1" maxOccurs="32">
<xs:element name="priorityZone" type="SignalControlZone" />
<!-- data about one or more priority zones -->
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
In addition, this item may be used by data structures in other ITS standards.
Remarks: Note that refInterNum and orientation are only present when a computed intersection is being
described (a concept similar to a computed vehicle lane). The preemptZones and priorityZones are used to
relate signal preempt and priority zones to specific request values.