This is the 201st most frequent Polish word.
ruchu
"Ruchu" means "movement" or "motion" in English.
Here, 'ruchu' refers to traffic, specifically vehicular and pedestrian activity on a street or in an area.
Nie było dużo ruchu na ulicy o tej porze.
There was not much traffic on the street at this time.
In this sentence, 'ruchu' pertains to road traffic, indicating the system that governs the movement of vehicles and pedestrians.
Zasady ruchu drogowego są bardzo jasne.
The rules of road traffic are very clear.
Here, 'ruchu' relates to physical movement or exercise, emphasizing activity as a factor of well-being.