Yes, it was about 6 or so years ago. I don't think I rode either of those roads, but I rode out of Riga at about midnight towards Tallinn on the E67. The main roads overnight were very quiet indeed. They are smooth and reasonably wide, progress was good. It was absolutely glorious, one of the most memorable rides.
In the day the roads are only really busy near the bigger towns, which can get a little hairy. Away from the coast there are a million log trucks thundering up and down, and I seem to remember the larger roads felt safer than the smaller ones when they were about. Suicidal? Definitely not.
