This is the 1747th most frequent Polish word.
transportu
"Transportu" means "of transport" or "transport" in English, referring to the act or system of moving people or goods.
The word 'transportu' serves as the genitive case of 'transport' due to it being partitive use after the adjective 'publicznego'.
Korzystamy z publicznego transportu, aby dotrzeć do pracy.
We use public transport to get to work.
In this sentence, 'transportu' functions as the genitive case to express the limiting of the entity 'transport'.
Ekologia wymaga ograniczania transportu zanieczyszczającego środowisko.
Ecology requires limiting transportation that pollutes the environment.
Here, 'transportu' again uses the genitive case to specify that the development pertains to 'transport'.