Never thought about this before, my mind tells me that this number of provided parking stalls is
an Architectural requirement not a Civil one, sO I really wonder why we are even bothering counting/labeling
number of provided spaces on our plans, when it is really NOT our problem or obligation to contend for this issue....just me thinking out loud....
Not sure what sort of 'Civil' design work you do, but here in the Transportation, Urban Land (public & private) sectors, we frequently have to provide parking spaces, be they for a new shopping center, office site, subdivision, or townhome/apartment complex.
As example, the Land Development Code down here requires a specific parking ratio for various forms of Agricultural, Commercial, Industrial, Community Service, Recreational, Residential, Residential Support, Transportation, and Warehousing uses.