@OTS posted:at this time I'm thinking of a landscaped border at the front edge..not tall enough to hide the train but enough of a buffer in case of an issue with derailment. I don't want to use the plexiglass safety edge or other methods. This is my plan anyway.
The Valley Farm Market in Weedville Pa. has a ceiling mounted train and Charlie had a unique way to stop engines from falling to the floor.
There were verticle wire or pin pieces that had what looked like a couple horizontal fine wires strung between them . It gave a clear view of the running trains without having room reflections like clear plexiglass does.