Key:ref:colour

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Public-images-osm logo.svg ref:colour
Spanish ref example.png
Description
The colour of the highway reference as it is found on road signs. Show/edit corresponding data item.
Group: highways
Used on these elements
should not be used on nodesmay be used on waysshould not be used on areasuse on relations unspecified
Status: de factoPage for proposal

ref:colour=* describes the color of the highway reference as it is found on road signs.

Disambiguation

This key is particularly prevalent in Spain, where the generally color-coded system of road number signs has many idiosyncratic exceptions. Each road is primarily known by its number, but displaying the road number sign in the wrong color would cause confusion. [1][2] For example, one does not refer to an Autovía Anaranjada (Orange Highway) but rather the number, which happens to be displayed against an orange background, unlike some of the other routes in the same network.

By contrast, in many public transit networks worldwide, as well as some small road networks, a route is associated with only a color (e.g., "Blue Route" or "Red Line"). Such colors are commonly indicated by colour=* instead of ref:colour=*.

When a route network as a whole is associated with a particular color, use network=* to indicate the network. It is generally the renderer's responsibility to display an appropriately colored graphic for each route tagged with a particular network. For recreational route networks, osmc:symbol=* also includes color information.

When a motorway's highway=motorway_junctions are color-coded, use destination:colour=* on the link ways.

Rationale

Add to the highway tagging (highway=*) the ref colour (the colour of road signs) in order to have

  • more info
  • better orientation
  • local flavour
  • administrative classification (when colours match)

Sign colour is a geographical "fact"

With this ref:colour scheme, highway tags can describe both features at the same time. We can see physical and administrative highway classification at the same time. and they can be tagged independently.

Tags

ref:colour=* way reference colour
ref:colour_tx=* way reference text colour
ref:colour_bg=* sign background colour

for international references same but with
int_ref:colour_*=*

values

black, white, blue, green, red, orange, brown, yellow, purple, grey

or hex colour number

Render

Render could take in account (highway=*) tags to paint the ways (as it is now),
but can also take in account ref:colour=* to paint the shields.

This way we can see physical and administrative highway classification at the same time. and they can be tagged independently

Render example

This is a road that changes physically but has same road signs

Will be in use in OsmAnd (Version > 2.??)

Primary mk.pngEs EX-208 gww.pngPrimary mk.pngTertiary mk.pngEs EX-208 gww.pngTertiary mk.pngSecondary mk.pngEs EX-208 gww.pngSecondary mk.png

Tagging examples

ref:colour schema
render highway=* ref=* ref:colour=* ref:colour_tx=* ref:colour_bg=*
International route (Europe)
 E-5  highway=motorway int_ref=E-5 int_ref:colour=green int_ref:colour_tx=white
Spain
Es SO-P-6001 pww.png highway=tertiary ref=SO-P-6001 ref:colour=purple ref:colour_tx=white
Es M-516 ykw.png highway=tertiary ref=M-516 ref:colour=yellow ref:colour_tx=black
Es M-513 gww.png highway=secondary ref=M-513 ref:colour=green ref:colour_tx=white
Es M-503 okb.png (NW stretch from M-40 [3],
blue signs. no roundabouts nor crossings)
highway=primary , motorroad=yes ref=M-503 ref:colour=orange ref:colour_tx=black ref:colour_bg=blue
Es M-503 okw.png
(SW stretch from M-40 [4],
white signs. roundabouts and crossings)
highway=primary ref=M-503 ref:colour=orange ref:colour_tx=black
Es N-VI rww.png highway=trunk ref=N-VI ref:colour=red ref:colour_tx=white
Es N-VI rwb.png highway=trunk , motorroad=yes ref=N-VI ref:colour=red ref:colour_tx=white ref:colour_bg=blue
Es A2 bwb.png highway=motorway ref=A2 ref:colour=blue ref:colour_tx=white ref:colour_bg=blue