Well mainly from experience it's the motorways where the inside lanes are closed off with concrete barriers as they have been destroyed by all the HGV traffic which concentrates in the country as transit off the major ferry routes into the rest of Europe. There appeared to be no attempt to repair them I guess because they don't have the money hence the permanent concrete barriers which reduce the width of the available two remaining lanes. All a bit scary at times.
(, Sun 4 Jul 2021, 14:27, Reply)
Also never ever join the Brussels Ring Road unless you have a few years to spare.
(, Sun 4 Jul 2021, 22:25, Reply)