Tag:highway=primary_link

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Public-images-osm logo.svg highway = primary_link
B20 (Ausfahrt Fridolfing-Kaltenbrunn) - geo-en.hlipp.de - 11914.jpg
Description
Connecting slip roads/ramps of primary highways Edit or translate this description.
Group: Highways
Used on these elements
should not be used on nodesmay be used on waysshould not be used on areasshould not be used on relations
Useful combination
See also
Wikidata
Status: de facto

Used to identify slip roads/ramps and "channelised" (physically separated by an obstruction or painted island) at-grade turning lanes connecting the through carriageways/through lanes of a highway=primary to other minor roadways.

Slip roads/ramps are usually considered to "belong" to the through highway they exit and enter. This is usually the higher classification of the intersecting highways because on and off ramps almost always have the same kind of restrictions as the main road. Therefore, highway=primary_link should be used on a slip road/ramp which connects a highway=primary to a secondary, tertiary, or other minor highway.

See Link_(highway) for details and exceptions

How to map

To map a simple primary link highway you can just draw a line for it. Select the way and tag with highway=primary_link. Use oneway=yes when it is not possible to drive in both directions on the highway. Make sure the way points in the same direction as the one way goes, otherwise reverse the direction or use oneway=-1.

To attach more information for the highway you should add further keys:

  • destination=* - Link roads normally do not have names. Please use destination=* and its extensions tag to give the cross-street's ref=* and signed destinations such as a city or the name of the destination street, so that routing engines can correctly announce the exit to the "name or ref of the destination street" as you enter the _link
  • maxspeed=number The maximum speed, in kilometers per hour which is allowed on the road, for example 120
  • maxweight=number The weight limit in tonnes, for example 5.5
  • lanes=* The number of lanes

Special situations

In the case you do not have a normal highway you should take a look on these sites:

  • bridge=yes - If the highway goes over a street or waterway.
  • tunnel=yes - If the highway goes below a street or waterway.

If the link is one-way only, add oneway=yes.

Examples

In the example, the main road is red and the highway=primary_link is marked in blue. There are parts that are mapped with oneway=yes and others that do not get this property.

See also