What is a requirement for the construction and maintenance of walkways?

A requirement for the construction and maintenance of walkways emphasizes that they must be of substantial construction. This means that walkways should be designed and built to withstand regular use and environmental effects, ensuring safety and durability. Substantial construction typically includes using appropriate materials and proper engineering principles to prevent accidents caused by wear, erosion, or structural failure.

While the other options like lighting, bright colors, and handrails can enhance safety and usability, they are not universally mandated requirements for walkways. The focus on substantial construction addresses the foundational integrity and safety of the walkway, making it a primary concern in construction and maintenance practices. Thus, ensuring that walkways can handle the anticipated pedestrian traffic and potential loads is essential for preventing hazardous situations on incomplete or inadequate surfaces.