交通不便 have poor transport facilities not be conveniently located 他们家居处近郊, 交通十分不便。 They live near the suburbs, so transportation is not very convenient for them
地道的说法是 congestion 交通堵塞,或 congested. E.g., You should have seen how congested the highway was this morning. There is so much congestion during the morning hours, so I quit driving. 答完了才意识到答...