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SAE J2735-Draft-Rev26 [issued: 09-18-08]
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178 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
DF
DF
In addition, this item may be used by data structures in other ITS standards.
7.123 Data Element: DE_Speed
Use: The vehicle speed expressed in unsigned units of 0.01 meters per second. Negative values can be
imply but using the heading data element to indicate that the vehicle is moving in reverse.
ASN.1 Representation:
Speed ::= INTEGER (0..32765) -- Units of 0.01 m/s
XML Representation:
<xs:simpleType name="Speed" >
<xs:annotation>
<xs:documentation>
Units of 0.01 m/s
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:unsignedShort">
<xs:maxInclusive value="32765"/>
</xs:restriction>
</xs:simpleType>
Used By: This entry is directly used by the following 4 other data structures in this standard (record type,
descriptive name, ASN.1, and XML name (if present) of each):
DF
DF
DF
MSG
In addition, this item may be used by data structures in other ITS standards.
7.124 Data Element: DE_StabilityControlStatus (DUPE)
Use: This data element reflects the current state of the stability control systems status.
The "Stability Control Status" Probe Data Element is intended to inform Probe Data Users whether the
vehicle's stability control unit was engaged at the time a Probe Data snapshot was taken. A typical stability
control unit uses the vehicle's yaw rate to determine how far off-axis a vehicle is while taking a turn. This
data is correlated with wheel speed, steering angle and acceleration position. If the vehicle is determined to
be too far off-axis, corrective action is taken by automatically applying braking force to separate wheels
independent of the driver's actions. The element informs the user if the vehicle is NOT equipped with a
stability control system. If the vehicle is equipped with a stability control system, the element reports
whether the system is Off, or in an Active state.
ASN.1 Representation:
StabilityControlStatus ::= ENUMERATED {
notEquipped (0), -- B'00 Not Equipped
off (1), -- B'01 Off
on (2) -- B'10 On or active (engaged)
}
-- Encoded as a 2 bit value
XML Representation:
<xs:simpleType name="StabilityControlStatus" >
<xs:annotation>
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