It runs from Kaunas to the Latvian border near Zarasai.

The section from Kaunas to Jonava has been upgraded to a dual carriageway with at-grade junctions, at-grade pedestrian crossing points, U-turns and traffic-lights.

The remaining sections are roads with one lane in each direction, leading through towns like Ukmergė, Utena and Zarasai.

In July 2023, the new project was approved for rerouting A6 from the south of Jonava to the suburbs of Skaruliai and Šveicarija.

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