[alistairSH]

Properly marking a construction zone isn't a change in practice - it's already required. But that doesn't mean it was done properly in this case.

If a construction zone is unmarked, human drivers are more likely to drive into it as well.

Anyway, AI cars should be smart enough to "see" a potential unmarked construction zone, just as most humans can. I'm only saying construction zones should be marked explicitly for the safety of all involved.