This is the 3271st most frequent Russian word.
опытные
Experienced.
The word 'опытные' here describes engineers as being skilled and experienced in their field.
Опытные инженеры решили сложную задачу.
Experienced engineers solved a complex problem.
In this sentence, 'опытные' characterizes the doctors as having significant professional expertise enabling prompt action.
Опытные врачи быстро поставили диагноз.
Experienced doctors quickly made a diagnosis.
This usage of 'опытные' implies that drivers have considerable practice and skill in driving, though not guaranteeing perfection.