Are they to prevent people from slipping and falling off the edge?

But design can help to prevent us from slipping into escapism.

Guard posts were set up in the region to prevent people from slipping around the custom house.

It did an excellent job of preventing their boots from slipping on the steep surface.

Sarah grabbedher and prevented her from slipping over the other side of the horse.

He made four further appearances that season but could not prevent the club from slipping into League One.

Until then, the existing system remains the only way of preventing many people from slipping into homelessness and despair.

The high arms of the chair prevented him from slipping to the floor.

It is difficult, he said, to prevent anyone from slipping across the line.

"The reason for that is to prevent her from slipping into psychosis," he said.