Hmm, "possible" was probably too strong of a word. Of course it's possible. However, I've driven a significant number of hours in Spain, Switzerland, Germany,

Hmm, "possible" was probably too strong of a word. Of course it's possible. However, I've driven a significant number of hours in Spain, Switzerland, Germany, UK, Ireland, Sweden, Denmark, Norway, Sweden, Finland, Estonia, and I wouldn't say that this kind of concrete divider is "readily available" as a normal part of a high-speed road, lacking the high-visibility markings I outlined in the post above, year after year as a normal fixture. In fact, I don't remember ever once seeing a concrete divider like this in the EU, even temporarily, but please prove me wrong (and maybe we can tell them to fix it!). At highway speeds, lane dividers are only used when there is a lane traveling in the opposing direction right next to you. There is no point in concrete dividers if all the traffic is traveling in the same direction. At highway speeds, opposing lanes should be divided by a lot of open space and metal fences that don't kill you when you hit them.