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SAE J2735-Draft-Rev28 [issued: 11-10-08]
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213 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
MSG
<XML>, and
MSG
In addition, this item may be used by data structures in other ITS standards.
7.154 Data Element: DE_VehicleWidth
Use: The width of the vehicle expressed in centimeters, unsigned. Note that this is a 10 bit value and it is
combined with a 14 bit value to form a 3 byte data frame. When sent alone it shall occupy 2 bytes with the
upper six bits being set to zero. The width shall be the widest point of the vehicle with all factory installed
equipment.
ASN.1 Representation:
VehicleWidth ::= INTEGER (0..1023) -- LSB units are 1 cm
XML Representation:
<xs:simpleType name="VehicleWidth" >
<xs:annotation>
<xs:documentation>
LSB units are 1 cm
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:unsignedShort">
<xs:maxInclusive value="1023"/>
</xs:restriction>
</xs:simpleType>
Used By: This entry is used directly by one other data structure in this standard, a DF called
DF_VehicleSize <ASN> <XML>. In addition, this item may be used by data structures in other ITS
standards.
Remarks: Observe that this data element is often combined with DE_VehicleHeight when used.
7.155 Data Element: DE_VerticalAccelerationThreshold
Use: A bit string enumerating when a preset threshold for vertical acceleration is exceeded at each wheel.
The "Wheel that exceeded Vertical G Threshold" Probe Data Element is intended to inform Probe Data
Users which vehicle wheel has exceeded a pre-determined threshold of a percent change in vertical G
acceleration per second at the time a Probe Data snapshot was taken. This element is primarily intended to
be used in the detection of potholes and similar road abnormalities. This element only provides
information for four wheeled vehicles. The element informs the user if the vehicle is NOT equipped with
accelerometers on its wheels or that the system is off. When a wheel does exceed the threshold, the
element provides details on the particular wheel by specifying Left Front, Left Rear, Right Front and Right
Rear.
ASN.1 Representation:
VerticalAccelerationThreshold ::= BIT STRING {
allOff (0), -- B'0000 The condition All Off or not equipped
leftFront (1), -- B'0001 Left Front Event
leftRear (2), -- B'0010 Left Rear Event
rightFront (4), -- B'0100 Right Front Event
rightRear (8) -- B'1000 Right Rear Event
} -- to fit in 4 bits
XML Representation:
<xs:simpleType name="VerticalAccelerationThreshold-item" >
<xs:annotation>
<xs:appinfo>
allOff (0) -- B'0000 The condition All Off or not equipped
leftFront (1) -- B'0001 Left Front Event
leftRear (2) -- B'0010 Left Rear Event