Where are barriers required while working on a moving walk?

When working on a moving walk, barriers are specifically required at embarkation and disembarkation points to protect passengers and aid in safe boarding and alighting. These points are critical because they are where users enter and exit the moving walk, making them susceptible to accidents if proper safety measures are not in place. Barriers can prevent potential hazards, such as individuals tripping over the edge of the moving walk or falling if there is a sudden stop or malfunction.

In contrast, barriers placed in the center of the moving walk or at regular intervals (like every 5 feet) are not practical or necessary since they would obstruct the walk's purpose and flow of passenger movement. Similarly, having barriers only at both ends might not sufficiently address safety where users engage with the moving walk, which is why focusing on embarkation and disembarkation points is essential for ensuring a safer experience.