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SAE J2735-Draft-Rev26 [issued: 09-18-08]
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136 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
7.59 Data Element: DE_HeadingSlice
Use: A DE used to define a set of sixteen 22.5 degree slices of a unit circle (defined as 0~360 degrees of
heading) which, when set to one, indicate that travel or motion along that angle is allowed. Typically used
to indicate a gross direction of travel to which the enclosing message or data frame applies. For example a
value of 0x8181 would indicate travel both directions due East and due West. A 2 byte value.
ASN.1 Representation:
HeadingSlice ::= INTEGER (0..65535) -- Each bit 22.5 degree starting from
-- North and moving Eastward (clockwise)
-- Define global enums for this entry
noHeading HeadingSlice ::= 0
allHeadings HeadingSlice ::= 65535
from000-0to022-5degrees HeadingSlice ::= 1
from022-5to045-0degrees HeadingSlice ::= 2
from045-0to067-5degrees HeadingSlice ::= 4
from067-5to090-0degrees HeadingSlice ::= 8
from090-0to112-5degrees HeadingSlice ::= 16
from112-5to135-0degrees HeadingSlice ::= 32
from135-0to157-5degrees HeadingSlice ::= 64
from157-5to180-0degrees HeadingSlice ::= 128
from180-0to202-5degrees HeadingSlice ::= 256
from202-5to225-0degrees HeadingSlice ::= 512
from225-0to247-5degrees HeadingSlice ::= 1024
from247-5to270-0degrees HeadingSlice ::= 2048
from270-0to292-5degrees HeadingSlice ::= 4096
from292-5to315-0degrees HeadingSlice ::= 8132
from315-0to337-5degrees HeadingSlice ::= 16334
from337-5to360-0degrees HeadingSlice ::= 32758
XML Representation:
<xs:simpleType name="HeadingSlice" >
<xs:annotation>
<xs:documentation>
Each bit 22.5 degree starting from
North and moving Eastward (clockwise)
Define global enums for this entry
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:unsignedShort"/>
</xs:simpleType>
Used By: This entry is directly used by the following 3 other data structures in this standard (record type,
descriptive name, ASN.1, and XML name (if present) of each):
DF
DF
MSG
In addition, this item may be used by data structures in other ITS standards.
Remarks: See also the heading DE used to define a specific single heading value found in other parts of
the DSRC message set.
7.60 Data Element: DE_HighPriorityFreightTrainAlarm
Use: The HighPriorityFreightTrainAlarm data element will be used to enumerate various type of
preemption events.
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