It runs from Šiauliai to the seaside resort town Palanga.

It's the most important road in the Northern Samogitia, connecting major towns of that region: Kuršėnai, Telšiai, Plungė, Kretinga.

Road section between A18 junction and Kuršėnai is dual-carriageway with at-grade crossings and traffic lights.

Remaining section is regular 1+1 with speed limits varying from default urban speed limits up to 50 km/h, and up to 90 km/h in rural areas.

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