Interesting! In Finland, we tag roads with that traffic sign as =service (or =track) only if that sign has with it a further sign that explicitly permits service vehicles (“Huoltoajo sallittu” in Finnish or “Servicekörning tillåten” in Swedish, as Finland is a bilingual country, roughly: “Service vehicles permitted”, here). In Finland, if the traffic sign does not have that permissive additional sign, driving along the road with any motor vehicle is forbidden. And there are lots of those around. That rules out =service and =track here. But your mielage might very well vary.
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