This is the 14526th most frequent Russian word.
парковками
"Парковками" means "parking spaces" or "parking lots" in the instrumental plural form.
The word 'парковками' is the instrumental plural form of 'парковка', and here it is used to indicate the means through which an action (usage) is performed.
В городе много парковок, но парковками пользуются неправильно.
There are many parking lots in the city, but they are used incorrectly.
In this sentence, 'парковками' is again the instrumental plural, emphasizing involvement with parking spaces in context to arising issues.
Проблемы с парковками возникают в час пик.
Problems with parking lots arise during rush hours.
The instrumental plural form 'парковками' shows who or what brings contentment.