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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.
msgID DSRCmsgID, -- App ID value, 1 byte
request2Cnt INTEGER (0..32), -- 1 byte
requests2 SEQUENCE (SIZE(0..32)) OF StdTagList,
-- Part II items
request3Cnt INTEGER (0..32), -- 1 byte
requests3 SEQUENCE (SIZE(0..32)) OF TwoByteTagList,
-- Part III items
... -- # LOCAL_CONTENT
}
XML Representation:
<xs:element name="commonSafetyRequest" type="CommonSafetyRequest"/>
<xs:complexType name="CommonSafetyRequest" >
<xs:sequence>
<xs:element name="msgID" type="DSRCmsgID" />
<!-- App ID value, 1 byte -->
<xs:element name="request2Cnt" >
<xs:simpleType>
<xs:restriction base="xs:unsignedByte">
<xs:maxInclusive value="32"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<!-- 1 byte -->
<xs:element name="requests2" >
<xs:complexType>
<xs:sequence minOccurs="0" maxOccurs="32">
<xs:element name="requests2-item" type="StdTagList" />
<!-- Part II items -->
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="request3Cnt" >
<xs:simpleType>
<xs:restriction base="xs:unsignedByte">
<xs:maxInclusive value="32"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<!-- 1 byte -->
<xs:element name="requests3" >
<xs:complexType>
<xs:sequence minOccurs="0" maxOccurs="32">
<xs:element name="requests3-item" type="TwoByteTagList" />
<!-- Part III items -->
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="localCommonSafetyRequest" type="local:CommonSafetyRequest"
minOccurs="0"/>
</xs:sequence>
</xs:complexType>
In addition, this item may be used by data structures in other ITS standards.
5.5 Message: MSG_EmergencyVehicleAlert
Use: The Emergency Vehicle Alert message is used to broadcast warning messages to surrounding
vehicles that an emergency vehicle (typically an incident responder of some type) is operating in the
vicinity and that additional caution is required. The message itself is built on the ATIS roadside alert
message which in turn uses the common ITIS phrase list to both describe the event and provide advice and
recommendation for travelers. The Emergency Vehicle Alert message appends to the message some
additional data elements regarding the overall type of vehicle involved and other useful data. Note that this
message can be used by both private and public response vehicles, and that the relative priority of each (as
well as security certificates) is determined in the application layer.
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