This is the 8569th most frequent Swedish word.
bilfri
Car-free.
Used as an adjective to describe the state of the city center being free of cars.
Stadens centrum är bilfri.
The city center is car-free.
Here, 'bilfri' modifies 'livsstil', indicating a lifestyle without the use of cars.
Vi har börjat sträva efter en bilfri livsstil.
We have started to strive for a car-free lifestyle.
'Bilfritt' is used as the neuter form of 'bilfri' since it qualifies 'område', a neuter noun.