I assume from version info that you are using [Only registered and activated users can see links. ], so your question should be posted in that thread.
Next, you should read [Only registered and activated users can see links. ].
I think (not sure) that [Only registered and activated users can see links. ], which has best truck support, calculates such route and only gives you a warning about violating restrictions.
If that doesn't work, then temporarily change vehicle to "Bus" with same dimensions.
P.S.
I've tested few such situations (restricted area for trucks) in my region and NG Israel with "Truck" profile gives only warnings about restriction violations, but calculated routes are total nonsense.
Best results were with "Bus" profile.
Moved to proper discussion.
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