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SAE J2735-Draft-Rev26 [issued: 09-18-08]
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This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
CrosswalkLane OPTIONAL,
...
}
XML Representation:
<xs:complexType name="Approach" >
<xs:sequence>
<xs:element name="name" type="DescriptiveName" minOccurs="0"/>
<xs:element name="id" type="ApproachNumber" />
<xs:element name="drivingLanes" >
<xs:complexType>
<xs:sequence minOccurs="1" maxOccurs="32">
<xs:element name="drivingLane" type="VehicleReferenceLane" />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="computedLanes" minOccurs="0">
<xs:complexType>
<xs:sequence minOccurs="0" maxOccurs="32">
<xs:element name="computedLane" type="VehicleComputedLane" />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="trainsAndBuses" minOccurs="0">
<xs:complexType>
<xs:sequence minOccurs="0" maxOccurs="32">
<xs:element name="trainsAndBuse" type="SpecialLane" />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="barriers" minOccurs="0">
<xs:complexType>
<xs:sequence minOccurs="0" maxOccurs="32">
<xs:element name="barrier" type="BarrierLane" />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="crosswalks" minOccurs="0">
<xs:complexType>
<xs:sequence minOccurs="0" maxOccurs="32">
<xs:element name="crosswalk" type="CrosswalkLane" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
Used By: This entry is used directly by one other data structure in this standard, a DF called
DF_ApproachesObject <ASN> <XML>. In addition, this item may be used by data structures in other
ITS standards.
Remarks: Note that the integer value given to each described item (lane, barrier, crosswalk, etc.) is used
in other messages and data frames to refer to that object within the context of the globally unique
intersection that this data frame is used in.
6.6 Data Frame: DF_ApproachesObject
Use: The ApproachesObject data structure associates a set of approaches and egresses with each other in
the intersection. Observe that the data structure of each is the same. These approaches then define lanes
with properties, each with a unique index value within this link object. The approach number is a
convenience assigned in this data structure to human users. The lane number is the key assignment used
to map between this and other objects (such as the movement states found in the SPAT message). The lane
number and the intersection number, taken as a set, represent a unique path of travel thought the link
(which may be traversed by specific types of travelers, vehicles, pedestrians, etc. as a function of the signal
timing and regulatory environment then in place). It may also contain additional information about the
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