Factual error: The Bandit is in a showdown with Buford T. Justice in a desert mountain range shortly after crossing into Texas. There are no desert mountain ranges in eastern Texas.
Factual error: There is absolutely no way a Trans Am can tow the weight of a 9,000 lb elephant, plus the weight of a newborn elephant and 2 trailers. Such weight with a car like that would, at the very least, break an axle and destroy a transmission.
Answer: To me, in real life, it looks like a roller coaster was already set up for demolition because of its poor conditions, and the crew was able to film it for the movie. However, in-universe, the owner kept saying they were closed. It's possible they were closed to repair the roller coaster to make it work but now it's completely destroyed and beyond repair.
Bishop73