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SAE J2735-Draft-Rev29 [issued: 12-11-08]
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48 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
6.11 Data Element: DF_ConnectsTo
Use: The ConnectsTo data structure is used in lane descriptions to provide a sequence of other defined
lanes to which this lane connects. The cited lane (a byte) must be of the same general type (vehicle lanes
connect to other vehicle lanes, pedestrian lanes connect to other pedestrian lanes, etc.). Each lanes number
is followed by a LaneManeuverCode data element (also a byte) which defines how this lanes if used by the
subject lanes (i.e it is the lane one would turn into when making a left hand turn lane). The transmitted
number of octets is always an even number.
ASN.1 Representation:
ConnectsTo ::= OCTET STRING (SIZE(2..32))
-- sets of 2 byte pairs,
-- the first byte is a lane number
-- the second byte is a LaneManeuverCode
XML Representation:
<xs:complexType name="ConnectsTo" >
<xs:simpleContent>
<xs:annotation>
<xs:documentation>
sets of 2 byte pairs,
the first byte is a lane number
the second byte is a LaneManeuverCode
</xs:documentation>
</xs:annotation>
<xs:extension base="ConnectsTo-string" >
<xs:attribute name="EncodingType" use="required">
<xs:simpleType>
<xs:restriction base="xs:NMTOKEN">
<xs:enumeration value="base64Binary"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
<xs:simpleType name="ConnectsTo-string">
<xs:restriction base="xs:base64Binary">
<xs:minLength value="3"/>
<xs:maxLength value="43"/>
</xs:restriction>
</xs:simpleType >
Used By: This entry is directly used by the following 4 other data structures in this standard (record type,
descriptive name, ASN.1, and XML name (if present) of each):
DF
<XML>, and
DF
<XML>, and
DF
<XML>, and
DF
In addition, this item may be used by data structures in other ITS standards.
Remarks: The assignment of lanes in the connects To structure shall statr with the left most lane
from the vehicle perspective (the u-turn lane in some cased) follow by subsequent lanes in a
clockwise assignment order. Therefore, the right most lane to which this lane connects would
always be listed last. Note that this order is observed regardless of which side of the road
vehicles use. If this structure is used in the lane description, then all valid lanes to which the
subject lane connects shall be listed.