This zone is represented in SkyDemon as an enormous surface. In reality, it is a "linear zone", without definition of lateral limits. One of the best VFR French Charts, Carta Bossy decided not to represent it, because it has almost never been activated and because legally, they consider it has not existence without a definition of lateral limits.
I fly frequently through there since that zone exists and I never found it activated, I really don't understand why they created it.
Anyway, It could be represented as a very narrow corridor, if you prefer to keep it, but for sure the big surface that appears in SD is not correct.