Depends on what you mean by "successful".

As messy as it seemed by many good standards the 'evacuation' of NOLA after Katrina was a success. Many were inconvenienced, some percentage were sickened or injured, and a few, fewer than most expected, died. Actual numbers of deaths were not out of line for any long weekend. Many pets and a few people were left behind but other than a few hundred everyone left and lived to tell about it.

Any major evolution of large numbers during wartime is, as a rule of thumb, expected to have a casualty rate of one percent. Most will be just injured but almost one in ten of these will be seriously injured or die.

Humans are difficult to move neatly, in many ways we herd like cats, and large migrations, particularly those done in haste, tend to get confused and messy.

Generally speaking any evacuation that gets 98% of the people out with only 2% of those moved getting injured and 0.5% dieing (mostly the very old, very young and sick) is about as good as it gets without a massive organizational effort and a lot of prepositioning of resources.

Cuba does a very good job during hurricanes. They have the entire population organized by block. Everyone is accounted for by block captains and most steps in the evacuation are planned and have been practiced.