Here was the last summary that I saw and I think I have updated based on comments:
1. Nearly universal agreement ("Rules"?):
a. Map driveways that serve multiple distinct addresses or properties.
b. Do NOT map driveways less than 10 meters long.
c. Do NOT map driveways that serve a single address or property unless covered below.
c. Mapped driveways should be marked as "Private Road".
2. General agreement ("Guidelines"?)
a. Map driveways over 50 meters
a2. Map driveways if Waze might confuse being on that driveway for being on an adjacent street or vice-versa.
a3. Map a driveway if it has its own street name and at least one address is assigned to that name, regardless of length.
b. Map driveways if the address coordinates are likely to route to an adjacent road that is inaccessible to the address.
d. Do NOT map driveways just to resolve a UR or system generated error.
e. Do NOT map driveways just because they appear on other mapping services.
f. Do NOT delete a driveway that you think does not meet the standards without trying to contact the creator of the segment first.
g. Do NOT map a driveway just because there is no recommendation not to map it without coming to the forums to discuss your unique situation so we can get consensus.
3. No current consensus ("Things to consider"?)
a. Name the driveway according to the street to which it's attached.
b. For named driveways, add house numbers.
2a3. I disagree with this since a road with a name is a road and should be mapped since it is likely to have addresses (even one) that cannot otherwise be reached.
2d. I disagree with this as a general guideline. I think it would depend upon the situation, like Waze seeing a car driving off the road and then snapping to an adjacent road nearby giving a "roads not connected" MP.
2f. I added this based on thread concerns and I agree.
2g. I added this based on thread concerns and I agree.
3a. If a driveway has no name, it should not be named. Names are for roads that have a visible sign that drivers can see in order to know where to turn (excluding when a sign is knocked down of course). Ehud told us not to kludge things in the map just to get something to work because then we have to undo all that is incorrect once they fix it.