Earth size? When was the last time you drove in Madagascar? Most driven miles are the same commute in the same city 10 times a week.

Well, it's been mostly done once with Google maps and street view. Presumably once it was done once and in use cities would have a vested interest in keeping it updated themselves. Judging by how many large potholes stick around for years near me I wouldn't keep my hopes up about it being well maintained though