TUSCUMBIA, AL (WAFF) Investigators are working to figure out what caused a zoo train to derail in Louisville, Kentucky.

Twenty-two people were hurt, including two young children. Investigators said the open air train passed a state examination in January and had its usual daily inspection Monday morning.

Spring Park in Tuscumbia has a train very similar to the one at the Louisville Zoo. It was built in 2003, and it's a favorite of many park visitors.

"You get to go across the bridges," said Muscle Shoals resident Trey Cox, who was visiting the park Tuesday. "It's really fun. I like the horn."

"We like it," said Florence resident Heather McFall, who brought her children to the park. "We try to ride it every time we are down here.

The recent accident in Kentucky has put a spotlight on the safety of these trains. John McWilliams is the general manager at Tuscumbia Railway.

"Trains come off the track," he explained.

The operators at Tuscumbia Railway have done a lot to make sure the riders on the train remain safe. McWilliams said when they built the track in 2003, they designed it so the train will not turn over. The ground is level for almost the entire track.

"If it comes off the track, it just rides the ground," said McWilliams. "There is no place it can roll over on its side."

Before operators allow visitors to get on the train, they do a hour-long safety check. That includes going around the entire track on foot to look for any problems, and to make sure the train is running properly.

"They always have a person on the front and back," said McFall. "Any time they try to jump on it going down through the park, or if a kid tries to get off of it, they'll stop it. We fee safe on it."

A feeling they hope every visitor has when they ride this train at Spring Park.

There have been two minor derailments at Spring Park in 2009. Operators say no one has ever been hurt while riding the train.