Key:traffic_signals:direction
 traffic_signals:direction
|
| Description |
|---|
Indicates the direction of travel affected by the traffic signals. 
|
| Group: highways |
| Used on these elements |
    |
| Requires |
| Status: in use |
| Tools for this tag |
traffic_signals:direction=* (or just direction=*) is used with highway=traffic_signals to indicate the direction of travel affected by the traffic signals.
Complex junctions where multiple crossing nodes are tagged with highway=traffic_signals can cause routing algorithms to interpret two or more individual traffic signals where in reality traffic signals only apply once to crossing traffic. This can be overcome by tagging the direction of travel affected by the traffic signals. Using this information, routing algorithms can better determine how traffic signals at a junction affect journey time and provide better weighted route choices.
This tag only applies for nodes that are part of a way. For traffic signal nodes placed at their real position next to the road, use direction=* with cardinal directions or angles as the value.
Values
- Main article: Direction of point features on ways
| Value | Element | Description |
|---|---|---|
forward
|
 (part of  )
|
The traffic signal affects the forward direction, relative to how the associated way was drawn in the editor. |
backward
|
(part of )
|
The traffic signal affects the backward direction, relative to how the associated way was drawn in the editor. |
both
|
(part of )
|
The traffic signal affects both the forward and the backward direction. |
See the separate page Direction of point features on ways for more details.
See also
- Tagging of complex intersections for how to use these tags.
highway=traffic_signals