Breakdown of Przy granicy często jest duży korek i samochody stoją godzinami.
Questions & Answers about Przy granicy często jest duży korek i samochody stoją godzinami.
All three are possible in Polish, but they’re not identical in meaning or feel:
przy granicy – literally “at/by the border”.
Emphasises being right next to the border area, in its immediate vicinity (e.g. the road leading to the border crossing).na granicy – literally “on the border”.
Often suggests being on the actual border line / crossing itself, or in some official sense (e.g. na granicy polsko‑niemieckiej = on the Polish‑German border).blisko granicy – “near the border”.
More general “somewhere near”, not necessarily right up against it.
In the sentence, przy granicy fits well because the traffic jam typically builds up right around the border crossing, not somewhere loosely “nearby” or exactly "on" the border line.