It connects Marijampolė and Russian border (Kaliningrad Oblast) near Kybartai.

Major cities near the road are Vilkaviškis, Virbalis and Kybartai.

The speed limit along most of the road length is 90 km/h.

It is one of two of the most important land roads to Kaliningrad Oblast from Lithuanian side.

The other one is E77 (A12 highway in Lithuania) that crosses border near Pagėgiai.