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SAE J2735-Draft-Rev29 [issued: 12-11-08]
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This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
<!-- the specific edition of the standard
that is being sent -->
<!-- the message and sub-message type, as
defined in the RTCM revision being used -->
<xs:element name="status" type="GPSstatus" />
</xs:sequence>
</xs:complexType>
In addition, this item may be used by data structures in other ITS standards.
Remarks: Observe that the transport layer details (preamble, CRC, etc.) as outlined in RTCM standard
10403.1 version 3.0 clause four are not sent in this message. In a similar fashion, the same framing
information found in clause 4.2 of the RTCM standard 10402.3 (version 2.3) is not sent. These would be
reconstituted after reception by a mobile device and before sending the resultant message to any positioning
device expecting messages in such a format, as outlined in the RTCM recommendations found in clause
four of each document. Also observe that the specific bit ordering of the transport message level used in the
final message varies between RTCM version 3.x and that of version 2.3.
5.10 Message: MSG_TravelerInformation
Use: The Traveler Information message is used to send various types of messages (advisory and road sign
types) over the WSM stack to vehicles. It makes heavy use of the ITIS encoding system to send well
known phrases, but allows limited text for local place names. The supported message types specify several
sub-dialects of ITIS phrase patterns to further reduce the number of bytes to be sent. The expressed
messages are active at a precise start and duration period, which can be specified to a resolution of a
minute. The affected local area can be expressed using either a radius system or a system of short defined
regions which is similar to the way roadway geometry is defined in the map fragment messages.
ASN.1 Representation:
TravelerInformation ::= SEQUENCE {
msgID DSRCmsgID,
packetID UniqueMSGID OPTIONAL,
dataFrameCount INTEGER(1..32) OPTIONAL,
dataFrames SEQUENCE (SIZE(1..8)) OF SEQUENCE {
-- Part I, Frame header
frameType TravelerInfoType, -- (enum, advisory or road sign)
msgId CHOICE {
furtherInfoID FurtherInfoID,
-- links to ATIS msg
roadSignID RoadSignID
-- to be defined as a DF
},
startYear DYear OPTIONAL,
-- Current year used if missing
startTime MinuteOfTheYear,
duratonTime MinutesDuration,
priority SignPrority,
-- Part II, Applicable Regions of Use
regions SEQUENCE (SIZE(1..8)) OF ValidRegion,
-- Part III, Content
content CHOICE {
advisory ITIS.ITIScodesAndText,
-- typical ITIS warnings
workZone WorkZone,
-- work zone signs and directions
genericSign GenericSignage,
-- MUTCD signs and directions