![]() ![]() ![]() ![]() SAE J2735-Draft-Rev28 [issued: 11-10-08]
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This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
6.11 Data Frame: DF_CrosswalkLane
Use: A Crosswalk Lane data structure provides a unique lane number, lane width and lane attributes and a
path within an approach structure for a pedestrian cross walk or other non-motorized vehicle path that is
part of the approach such as a bicycle lane. The CrosswalkLaneAttributes data element denotes what
generally type of crosswalk it is. The nodeList data element provide a detailed set of offset values to map
the path of the lane. The keepOutList (which is optional) denotes any segments along the path where users
of the path (such as pedestrian traffic) can not safely stop, and can thereby be used to denote where traffic
islands may be found along the path.
ASN.1 Representation:
CrosswalkLane ::= SEQUENCE {
laneNumber LaneNumber,
laneWidth LaneWidth OPTIONAL,
laneAttributes CrosswalkLaneAttributes,
nodeList NodeList,
-- path details of the lane
-- note that this may cross or pass
-- by driven lanes
keepOutList NodeList OPTIONAL,
-- no stop points along the path
-- typically the end points unless
-- islands are represented in the path
...
}
XML Representation:
<xs:complexType name="CrosswalkLane" >
<xs:sequence>
<xs:element name="laneNumber" type="LaneNumber" />
<xs:element name="laneWidth" type="LaneWidth" minOccurs="0"/>
<xs:element name="laneAttributes" type="CrosswalkLaneAttributes" />
<xs:element name="nodeList" type="NodeList" />
<!-- path details of the lane
note that this may cross or pass
by driven lanes -->
<xs:element name="keepOutList" type="NodeList" minOccurs="0"/>
<!-- no stop points along the path
typically the end points unless
islands are represented in the path -->
</xs:sequence>
</xs:complexType>
Used By: This entry is used directly by one other data structure in this standard, a DF called
DF_Approach <ASN> <XML>. In addition, this item may be used by data structures in other ITS
standards.
Remarks: Note that the keepOutList is typically the entire path unless traffic islands are to be described
where users may stop. Typically this is conveyed with two data points, the start and end points of the path.
This in the inverse of the data typically found for motorized vehicle paths where the keepOutList is
typically absent or only present to denote segment of the roadway where vehicles may not stop or come to
rest (such as "do not block" areas).
6.12 Data Frame: DF_DataParameters
Use: The DataParameters date frame is used to provide basic (static) information on how a map fragment
was processed or determined.
ASN.1 Representation:
DataParameters ::= SEQUENCE {
processMethod IA5String(SIZE(1..255)) OPTIONAL,
processAgency IA5String(SIZE(1..255)) OPTIONAL,
lastCheckedDate IA5String(SIZE(1..255)) OPTIONAL,
geiodUsed IA5String(SIZE(1..255)) OPTIONAL,
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