Pretty good road connecting LT and LV, goes around lakes, through forests and agricultural planes. LT side surfase is great, LV - pretty good but with few short exceptions. Make sure to visit "Sartai" lake observation tower - excellent scenic view, one of the highest towers in Lithuania with an epic but narrow brand new road to it.
Another great part of most popular motorcycling road from Vilnius to Kaunas. Perfect surface, great visibility, can race (but shouldn't)
This is a scenic highway part, make sure to drive through the Hydro Electricity plant. Great surface, pretty scenic. If you need to travel fast - it's a great way to go. Very open, safe, and not boring at all.
Pretty good road with few exceptionally good riverside scenic sections. The tarmac is OK mostly, but there are some very short low quality sections. Make sure to check power plants and Jaunjelgava town river side panoramic stop.
A great part simple and well maintained scenic road. Low traffic.