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The road provides access to the Midi-Pyrénées towards the Principality of Andorra, and the junctions between Ariégeois and Toulouse.
Junctions
This article contains a bulleted list or table of intersections which should be presented in a properly formatted junction table. Please consult this guideline for information on how to create one. Please improve this article if you can.(December 2021)
Exchange A61-A66 Junction with A61 autoroute to Toulouse.
The N20 dual carriageway between Pamiers, Foix and Tarascon-sur-Ariège is to be upgraded to motorway standard, and renumbered the A66, however no date for this has been announced.[1]