This is the 4511th most frequent Russian word.
выезжали
"Выезжали" means "went out" or "departed" (by vehicle).
Here, 'выезжали' indicates a repeated action of traveling to a specific place (the dacha) in the past.
Мы часто выезжали на дачу по выходным.
We often went to the dacha on weekends.
In this sentence, 'выезжали' shows a singular action in the past of leaving the city.
Вчера мы выезжали из города очень поздно.
Yesterday we left the city very late.
The word 'выезжали' here indicates the action of traveling abroad, which is negated as never happening.