Ian, would it be fair to say that your model would require the presence of the 4x4_only tag on all unsealed roads to be useful ? Currently, the default is that no 4x4_only tag means no restriction. I suggest its a bit late to change that behavior, too many roads already in the database would need to be updated.
David ----- Original Message ----- From: "Ian Sergeant" Personally, I would find a tag 4x4_only=no source:4x4_only=survey Would be a great tag on a dirt road. In means that someone has surveyed it, and it doesn't require a 4x4. Great info to capture.
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