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Intersection Categories

Definition: Identifies links that are part of or associated with road intersections. These include links created when multiply digitized roads are intersected or when the centerlines of intersecting roads do not meet at a single node. Intersection coding can be used for explication and display.

Code Description
1 Intersection Internal Link—Indicates that a road segment should be viewed as part of the intersection, instead of as an individual piece of road. A separate guidance instruction should not exist for this segment. For example, if making a U-turn the Intersection Internal link should be ignored, and the driver should be told to make a U-turn, not "turn left, turn left".
2 Maneuver Link—Indicates that only one command should be given despite the fact that technically two turns occur—one at each end of the turn lane. It is only necessary to state "turn right" near the beginning of the maneuver because generally at the end the driver does not have a choice in direction.
3 Indescribable Link—Indicates a turn that cannot be explained in one command or at all. A graphic may be needed to illustrate the turn. In these situations a driver may need to go right to make a left turn.
4 Roundabout Link—Indicates a contiguous loop with consistent one-way traffic throughout the circle that controls the traffic flow from converging roads.
5 Undefined Traffic Area Link—Indicates links inside of an Undefined Traffic Area polygon (Feature Type - 900159), which is a paved area where a car can travel, but there are no legally defined traffic paths.
6 Special Traffic Figure Link—Indicates a somewhat circular intersection which controls the traffic flow from incoming roads.
No value Not applicable.