Sliding gates often fail to open or close because debris blocks the track, wheels slip off the rail

https://archerjjxj618.brightsora.com/posts/keeping-commercial-sliding-gates-running-in-la-with-track-roller-and-safety-checks-3

Sliding gates often fail to open or close because debris blocks the track, wheels slip off the rail, tracks shift out of line, or the operator needs a reset after an obstruction is cleared.