1. Usually, at railway crossings or T-junctions, where there are no signal lights or no personnel on duty, including some intersections with complicated road conditions, octagonal stop signs will be set to indicate the meaning of stopping and giving way.

2. "Stop and give way" is a traffic ban sign, and "stop" is added in the middle of the octagon, which means stop at the stop line of the intersection and wait and see before driving. It means that vehicles must stop outside the stop line to observe and confirm safety before they are allowed to pass. It is universal in automobile driving. The sign is octagonal with white characters and white edges on a red background.