I’m not saying the proposal should be rejected wholesale, but I don’t think it’s proper in most cases.
Users searching for an address expect to find one result for that address, and they expect it to take it where they expect it to take them.
For a public parking lot not associated with a building and which is the only thing for that address, address search should work the same, providing only one result for 123 Jefferson Ave, which will take them where they want to go.
If a regular HN is inadequate for this purpose, RPP and/or PLR can and should be used, like any other address. This will continue to ensure the best experience for all users, who select the lone address result for that address, as is proper.
The appropriately unnamed parking lot place which is there allows for the primary intended usage of the parking lot feature: the selection of that lot from a list of parking lots nearby to you or your destination.
If the lot is named simply with the address, (1) that list will show the address twice, a la
“930 Jefferson St
930 Jefferson St, New Orleans”
which is redundant and can take up unnecessary space in the list; and (2) search results for the address will now be polluted and confusing, with 2 results for 930 Jefferson St: an address result and the parking lot. Users who aren’t regular and knowing editors (i.e., essentially all users) will not know or understand the difference and will not know or understand which is the better result.
So, you end up with essentially all users not necessarily going to the right place, or not knowing what the right place is. The Google address result is always going to be there, and we can’t do anything to stop it. Our best practice, therefore, should be to provide one and only address result to users, and to ensure that it navigates as best as it can, whether with HN, RPP, or RPP + PLR.
Naming the lot “Parking - 930 Jefferson St” instead doesn’t really help with the user selection issue. This could either make it more or less confusing, but it doesn’t fix the problem, you’re still providing 2 results for 1 location in 1 search, and the nearby parking list is still redundant (except the problem of taking up extra space is even worse).
Now, all that being said,
There is a limited case that perhaps should already allow for the format “Parking - [address]”, and that’s where a building is known by/named for its address. There are a few skyscrapers in downtown New Orleans named things like “930 Poydras” for example.
There is also a case to be made, perhaps, for a lot with an operator name (say, “Premium Parking”) which has a lot named after an address (say, “882 Jefferson Ave”) to be named in the normal way that a lot with an operator is named, e.g., “882 Jefferson Ave - Premium Parking”. But there is also an argument that this still creates redundancy, in that you’d get the same amount of information from a result that says,
“Premium Parking
882 Jefferson Ave, Citytown”
as you would from a result that says,
“882 Jefferson Ave - Premium Parking
882 Jefferson Ave, Citytown”
but without taking up as much space in the interface, as the latter is likely to wrap onto multiple lines of text.
But I would not want to go much further than that. The normal format for standalone public lots is just “[name]” where there is a name, and no name where there isn’t. Anything more pollutes address search. Further, because it has been our standard for quite a long time, “Parking - [name]” implies that the lot is a parking lot associated with a separate location called [name], and is therefore not appropriate for standalone lots.