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SAE J2735-Draft-Rev28 [issued: 11-10-08]
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208 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
which can be used by the signal systems in its response with changes to the timing plan in use. Note that
this status is used in both priority and preemption use cases but that the information mapped into the lower
4 bits varies with each.
ASN.1 Representation:
VehicleRequestStatus ::= OCTET STRING (SIZE(1))
-- With bits set as follows:
-- Bit 7 (MSB) Brakes-on, see notes for use
-- Bit 6 Emergency Use or operation
-- Bit 5 Lights in use (see also the light bar element)
-- Bits 5~0
-- when a priority, map the values of
-- LightbarInUse to the lower 4 bits
-- and set the 5th bit to zero
-- when a preemption, map the values of
-- TransistStatus to the lower 5 bits
XML Representation:
<xs:complexType name="VehicleRequestStatus" >
<xs:simpleContent>
<xs:annotation>
<xs:documentation>
With bits set as follows:
Bit 7 (MSB) Brakes-on, see notes for use
Bit 6 Emergency Use or operation
Bit 5 Lights in use (see also the light bar element)
Bits 5~0
when a priority, map the values of
LightbarInUse to the lower 4 bits
and set the 5th bit to zero
when a preemption, map the values of
TransistStatus to the lower 5 bits
</xs:documentation>
</xs:annotation>
<xs:extension base="VehicleRequestStatus-string" >
<xs:attribute name="EncodingType" use="required">
<xs:simpleType>
<xs:restriction base="xs:NMTOKEN">
<xs:enumeration value="base64Binary"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
<xs:simpleType name="VehicleRequestStatus-string">
<xs:restriction base="xs:base64Binary">
<xs:length value="2"/>
</xs:restriction>
</xs:simpleType >
Used By: This entry is used directly by one other data structure in this standard, a MSG called
MSG_SignalRequestMessage <ASN> <XML>. In addition, this item may be used by data structures
in other ITS standards.
Remarks: The MSB bit (the brakes-on bit) is used in the general sense of a vehicle which is not moving or
proceeding towards to light. Examples of use would be a response vehicle that has stopped short of the
light, but more typically a transit vehicle making a stop to load/unload before reaching the light. This bit
can be used by the signal system to disregard a request.
7.151 Data Element: DE_VehicleStatusDeviceTypeTag
Use: The VehicleStatusDeviceTypeTag element is an enumeration of every possible value which can be
found in the VehicleStatusDeviceType data frame. It is used to denote that value (and hence also the
length) of the data which follows it.