What is required regarding guardrails or berms along roadways?

The requirement for guardrails or berms along roadways is that they should be adequate and properly maintained. This is crucial for ensuring the safety of vehicles and pedestrians using those roadways. Proper maintenance means regular inspections and repairs as needed to prevent accidents that could occur due to failure of these safety features. Adequate guardrails or berms are designed to withstand the force of vehicles that may unintentionally veer off the road, thus protecting against potential hazards, such as steep drops or features that pose a risk of collision or rollover.

The other options reflect misunderstandings of the purpose and requirements of safety barriers. Decorative features may enhance aesthetics but do not contribute to safety; suggesting they be used only at intersections undermines their role in protecting all roadway segments; and omitting them in low-traffic areas could create unnecessary risks, as accidents can occur regardless of traffic volume. The emphasis on adequacy and maintenance aligns directly with safety regulations and best practices, highlighting the importance of these features in road design and management.