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SAE J2735-Draft-Rev18 [issued: 06-26-07]
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74 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
In addition, this item may be used by data structures in other ITS standards.
7.8 Data Element: DE_BrakeAppliedStatus
Use: A bit string enumerating the status of various brake systems (different wheels) of the vehicle. Brake
applied status indicates when vehicle braking has occurred. This may be used by traffic management
centers to determine that an incident or congestion may be present. It is possible for some vehicles to
provide an indication of how hard the braking action is but at this time only an indication that braking has
occurred is used.
ASN.1 Representation:
BrakeAppliedStatus ::= BIT STRING {
allOff (0), -- B'0000 The condition All Off
leftFront (1), -- B'0001 Left Front Active
leftRear (2), -- B'0010 Left Rear Active
rightFront (4), -- B'0100 Right Front Active
rightRear (8), -- B'1000 Right Rear Active
allOn (15) -- B'1111 The condition All On
} -- to fit in 4 bits
XML Representation:
<xs:simpleType name="BrakeAppliedStatus-item" >
<xs:annotation>
<xs:appinfo>
allOff (0) -- B'0000 The condition All Off
leftFront (1) -- B'0001 Left Front Active
leftRear (2) -- B'0010 Left Rear Active
rightFront (4) -- B'0100 Right Front Active
rightRear (8) -- B'1000 Right Rear Active
allOn (15) -- B'1111 The condition All On
</xs:appinfo>
<xs:documentation>
to fit in 4 bits
</xs:documentation>
</xs:annotation>
<xs:union>
<xs:simpleType>
<xs:restriction base="xs:int">
<xs:minInclusive value="0"/>
<xs:maxInclusive value="15"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="allOff"/>
<xs:enumeration value="leftFront"/>
<xs:enumeration value="leftRear"/>
<xs:enumeration value="rightFront"/>
<xs:enumeration value="rightRear"/>
<xs:enumeration value="allOn"/>
</xs:restriction>
</xs:simpleType >
</xs:union>
</xs:simpleType>
<xs:simpleType name="BrakeAppliedStatus">
<xs:list itemType="BrakeAppliedStatus-item"/>
</xs:simpleType>
Used by: This entry is directly used by the following 2 other data structures in this standard (record type,
descriptive name, ASN.1, and XML name (if present) of each):
DF
<XML>, and
DF
In addition, this item may be used by data structures in other ITS standards.