You might call it Eau de Car Park - the distinctive scent that assaults the nostrils as you enter the stairwell of a multi-storey[*].
Redolent of the urinal, it makes parking the car a less than fragrant experience.
But the days of taking a deep breath before dashing up three flights may be numbered.
— From Mmm... the fresh aroma of car park: How one company plans to pump out perfume at its multi-storeys at the UK MailOnline.
* The term "multi-storey", so far as I know, is not used in the United States. I would call it a "parking garage", but according to Wikipedia that usage is regional as well. Who knew.