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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.
id TemporaryID OPTIONAL,
-- Note: Uses the same request as probe management
requests SEQUENCE (SIZE(1..32)) OF RequestedItem,
... -- # LOCAL_CONTENT
}
XML Representation:
<xs:element name="commonSafetyRequest" type="CommonSafetyRequest"/>
<xs:complexType name="CommonSafetyRequest" >
<xs:sequence>
<xs:element name="msgID" type="DSRCmsgID" />
<xs:element name="msgCnt" type="MsgCount" minOccurs="0"/>
<xs:element name="id" type="TemporaryID" minOccurs="0"/>
<!-- Note: Uses the same request as probe management -->
<xs:element name="requests" >
<xs:complexType>
<xs:sequence minOccurs="1" maxOccurs="32">
<xs:element name="request" type="RequestedItem" />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="localCommonSafetyRequest" type="local:CommonSafetyRequest"
minOccurs="0"/>
</xs:sequence>
</xs:complexType>
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.
ASN.1 Representation:
EmergencyVehicleAlert ::= SEQUENCE {
msgID DSRCmsgID,
id TemporaryID OPTIONAL,
rsaMsg RoadSideAlert,
-- the DSRCmsgID inside this
-- data frame is set as per the
-- RoadSideAlert. The CRC is
-- set to a value of zero.
responseType ResponseType OPTIONAL,
details EmergencyDetails OPTIONAL,
-- Combines these 3 items:
-- SirenInUse,
-- LightbarInUse,
-- MultiVehicleReponse,
-- combine above three into one byte!
mass VehicleMass OPTIONAL,
basicType VehicleType OPTIONAL,
-- gross size and axle cnt
-- type of vehicle and agency when known
vehicleType ITIS.VehicleGroupAffected OPTIONAL,
responseEquip ITIS.IncidentResponseEquipment OPTIONAL,
responderType ITIS.ResponderGroupAffected OPTIONAL,
crc MsgCRC,
... -- # LOCAL_CONTENT