Hi Lem M,

I think that would be fairly unconventional. Probably better to add it in a tag which doesn’t get rendered such as description or note. It looks like fairly useful information so it’s worth adding.

The problem about using it as a ref is that this will show up on maps which can be misleading and it also may get used with voice navigation which could also be an issue. In the UK we have a similar thing with footpaths in the countryside which have identified and we decided to use prow_ref, so if this is commonly desired in the US (and I’ve seen similar in Argentina) you could might use a similar principle.

For the addresses, it’s often best to map these explicitly as addresses. Look at any city in Argentina for the use of interpolation ways to map the range of addresses in one block.