This is the 15245th most frequent Russian word.
портовая
Pertaining to a port or harbor.
Here, 'портовая' acts as an adjective describing 'зона,' indicating its relation to a port.
Портовая зона представляет собой оживленное место для грузов и торговли.
The port area is a busy place for goods and trade.
In this sentence, 'портовой' functions as an adjective modifying 'полиции,' specifying the type of police—related to the port.
Она работает в портовой полиции уже пять лет.
She has been working in the port police for five years.
Here, 'портовая' modifies 'инфраструктура,' identifying the subject as pertaining to port facilities.