Specialization AlertCMethod4Point

The specialization AlertCMethod4Point describes a single point on the road network defined by reference to a point in a predefined ALERT-C location table, with an offset distance and the corresponding traffic flow direction. The structure is as follows:

Elements

Note

For the completeness of the description, the elements alertCLocationCountryCode, alertCLocationTableNumber, and alertCLocationTableVersion are included. These stem from the fact that AlertCMethod4Point is derived from AlertCPoint.

Element	Type	Required	Domain	Description
alertCLocationCountryCode	String	Yes	8 (code for the Netherlands), D (code for NDW-VILD)	This element contains the EBU country code.
alertCLocationTableNumber	String	Yes	N/A	This element contains the release and version numbers of the used VILD, separated by a dot. For example, the value "6.7".
alertCLocationTableVersion	String	Yes	N/A	This element contains the subversion of the used VILD. For example, the value "A".
alertCDirection	AlertCDirection	Yes	N/A	This element indicates the direction in which the traffic is moving. It consists of two required elements: alertCDirectionCoded and alertCAffectedDirection.
alertCMethod4PrimaryPointLocation	AlertCMethod4PrimaryPointLocation	Yes	N/A	The reference to the location in the VILD with the offset. This element consists of two required elements: alertCLocation and specificLocation.

Sub-element alertCDirection

Element	Type	Required	Domain	Description
alertCDirectionCoded	_AlertCDirectionEnum	Yes	negative, positive, both	This element describes the direction in which the traffic is moving as shown in the VILD (via POS_OFF or NEG_OFF).
alertCAffectedDirection	_LinearDirectionEnum	Yes	both, opposite, aligned, unknown	This element provides additional information for navigation purposes.

Sub-element alertCMethod4PrimaryPointLocation

Element	Type	Required	Domain	Description
alertCLocation	AlertCLocation	Yes	N/A	The reference to a location (number) from the VILD, the offset, and optionally the name of the location.
offsetDistance	OffsetDistance	Yes	N/A	This element contains a subelement offsetDistance (MetresAsNonNegativeInteger) with the distance (in flow direction) between the alertCLocation.specificLocation and the location, expressed in meters.

Example

<alertCPoint xsi:type="AlertCMethod4Point">
    <alertCLocationCountryCode>8</alertCLocationCountryCode>
    <alertCLocationTableNumber>6.7</alertCLocationTableNumber>
    <alertCLocationTableVersion>A</alertCLocationTableVersion>
    <alertCDirection>
        <alertCDirectionCoded>negative</alertCDirectionCoded>
        <alertCAffectedDirection>aligned</alertCAffectedDirection>
    </alertCDirection>
    <alertCMethod4PrimaryPointLocation>
        <alertCLocation>
            <specificLocation>7068</specificLocation>
        </alertCLocation>
        <offsetDistance>
            <offsetDistance>0</offsetDistance>
        </offsetDistance>
    </alertCMethod4PrimaryPointLocation>
</alertCPoint>

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