Key:turn

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Public-images-osm logo.svg turn
Zeichen 297 - Richtungspfeile, StVO 1970.svg
Description
The key turn can be used to specify the direction in which a way or a lane will lead.
Group: Properties
Used on these elements
should not be used on nodes
may be used on ways
should not be used on areas
use on relations unspecified
Status: Unspecified

Turning indications

The turn=* key can be used to specify the indicated direction in which a way or a lane will lead. It is used on the way segment from the first indication via road markings, signposts or similar indications to the junction or completion of merge. If you instead want to specify legal turning restrictions please see the article about the restriction relation.

   turn=[left|slight_left|sharp_left|through|
         right|slight_right|sharp_right|
         reverse|merge_to_left|merge_to_right|none]

Note: there are still only a few examples for road markings and signposts in the following table. If you can provide a fitting image, please add it to the table.

Value Description Road marking example Signpost example
left left turn (only) Richtungspfeil Links.jpg MUTCD R3-5L.svgFr-B21c2-Tourner a gauche a la prochaine intersection.gifFr-B21-2-Tourner a gauche.gifMUTCD R3-7L.svg
slight_left slight left turn (only)
sharp_left sharp left turn (only)
through going straight through (only) Richtungspfeil Geradeaus.jpg Fr-B21b-Aller tout droit.gifMUTCD R3-5a.svg
right right turn (only) Richtungspfeil Rechts.jpg MUTCD R3-5R.svgZeichen 209-20.svgMUTCD R3-7R.svg
slight_right slight right turn (only) Autobahnkreuz A24 - A10 bei Potsdam - Leipzig - geo.hlipp.de - 3191 crop.jpg
sharp_right sharp right turn (only)
reverse reverse/U-turn (only) U turn A2 Lithuania.JPG
merge_to_left this lane merges with the lane to the left of it (only) Merge To Left.svg US "lane reduction ahead sign" signRight lane ends, one lane remaining on the left, shown with one lane of oncoming traffic
merge_to_right this lane merges with the lane to the right of it (only) Vorankündigungspfeil.svg US "lane ends" signFahrbahn 2.pngFr-C28 ex3.gif
none there are no turn indications on this lane.

Used especially for better readability in case of many lanes


If more than one indication is present, separate the different values with a ; (semi-colon). For example:

Fr-B21d2-Tourner a gauche ou aller tout droit.gif
 turn=left;through

Turning indications per lane

turn:lanes=*

Usually the turning indications of a road differ from lane to lane. To specify those indications for every lane, the :lanes extension is used. For details about the :lanes-extension, see Lanes.

In short:

  • The key changes to turn:lanes=*
  • View the road in the direction of the osm-way.
  • Add the lane-values to the value, starting with the leftmost lane and ending with the rightmost. Separate each lane-value with a | (vertical bar)

If you want to describe only the lanes of one direction of the road, use either turn:lanes:forward=* or turn:lanes:backward=*. The key turn:lanes:forward=* describes only the turning indications on the lanes in the same direction as the osm-way. The key turn:lanes:backward=* describes only the turning indications on the lanes in the opposite direction as the osm-way; doing so view the road in the opposite direction of the osm-way for this.

Example for a one-way

There are three lanes on a one-way, and the leftmost lane will turn left, the rightmost lane will turn right and the lane in the middle will go straight through the next junction.

 turn:lanes=left|through|right

Example for a road with both directions

There are two lanes on the road in each direction. Those lanes running in the same direction as the osm-way are considered to be "forward"; the others "backward". The left lane of the forward direction will turn left and the right lane will go straight through and also turns right. The left lane of the backward direction will go straight through, the right lane will turn right and also continue straight through.

 turn:lanes:forward=left|through;right
 turn:lanes:backward=through|through;right

Motorway with links and destinations

The following example shows a motorway with two links.

Lanes Example 1.png

  1.   lanes=3
      destination:lanes=A|A|B
    
  2.   lanes=3
      turn:lanes=none|none|through;slight_right
    
  3.   lanes=4
      turn:lanes=none|through|through|slight_right
    
  4.   lanes=3
    
  5.   lanes=4
      turn:lanes=none|none|none|merge_to_left
    
  6.   lanes=3
    

See also