Through Route
Definition
The Through Route
condition represents the continuation of the main road through an intersection.
Usage
Through Route
can be used in guidance messaging to either give no guidance when following the main road or to give specific guidance, such as “turn left to follow the main road,” when driving from A to B as seen in the following image.
Specification
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Through Route
conditions are applied to two contiguous road segments as origin and destination. The origin is the road segment prior to the road split and the destination is the road segment reflecting the continuation. See the following image, road segment A (origin) and B (destination).

-
Through Route
condition can exist in only one direction or in both directions, depending on the road marking (see the following image) or sign in each direction.
-
Through Route
conditions are applied to the road segments that uniquely identify the continuation of the road within an intersection. See the image above, road segment A and B.

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Through Route
conditions only exist on roads which are open to automobiles. -
The
Access Characteristics
ofThrough Route
condition is flagged on allVehicle Types
. -
Through Route
conditions can haveDate/Time Modifier
applied.