@ristosal - Point taken. It might be a toss up if it is the fastest as using the Northern road feeding the roundabout to the right and then the highway connecting those roundabouts together, placing the truck in the similar position on the highway, are faster roads than the two lane town roads, plain or grassed verged that it is using.
Classed as a delivery van that would allow it to ignore the ban and go where it chooses.
The four lane road where the Glass factory faces does not have a median, but I have not noticed vehicles if they are crossing it to turn into the factory or not. Something that I'll look for.