What defines the safety standards for running boards on railcars?

The correct choice focuses on length and width specifications, which are critical aspects of safety standards for running boards on railcars. These dimensions are established to ensure that the running boards can adequately support the weight of workers while providing enough space for safe movement. Properly sized running boards help to minimize the risk of slips, trips, or falls, which are among the leading causes of injuries in rail yard operations.

While the material type of running boards is also significant to their overall durability and safety in certain conditions, the specific safety standards primarily emphasize the physical dimensions. The color coding of components and regular inspection intervals, although important for identification and maintenance of safety, do not directly define the structural safety of the running boards themselves. The focus on length and width ensures that the running boards meet the necessary operational requirements and facilitate safe access on and off the railcars.