Aydın Tiryaki (2026)

This article focuses on the physical inadequacies of road barriers, design flaws, and how cost concerns often override the sanctity of human life.

The “Blind Spot” of Standards: Road Character

The biggest fallacy in road safety is applying a one-size-fits-all barrier (guardrail) standard to every road. A barrier’s design must be directly proportional to the road’s curvature, the steepness of the terrain, and, most importantly, the severity of the hazard beyond the road (cliffs, bodies of water, etc.).

• Cliffs and High-Risk Curves: A barrier that is expected only to slow down a vehicle on a flat road becomes the “primary life-saver” on the edge of a cliff. In these high-risk areas, standard (N1, N2) barriers must be replaced by H4 (High Containment) level systems capable of restraining even heavy vehicles like buses and trucks.
• Barrier Height and the Center of Gravity of Buses: High-occupancy vehicles like buses have a high center of gravity. Current standard barrier heights often act as a “step” for these vehicles, causing them to trip over the barrier or roll. In high-risk zones, barrier heights should be designed with multiple rails to specifically catch and hold the body of a bus.

The Cost Trap and Execution Failures

The claim that barriers are “up to standard” is often a mere formality on paper.

• Cost Concerns: The cost of an H4-class barrier is several times higher than a standard one. However, installing weak barriers in dangerous curves due to budget constraints is a clear violation of the right to life.
• The “Spear Effect” and Impalement Risks: If a barrier impales a vehicle during an accident, it proves the design of the “terminal point” is faulty. According to modern standards, the ends of barriers should either be buried or equipped with energy-absorbing cushions. A barrier that pierces a vehicle is not a safety device; it is a weapon installed incorrectly.

Conclusion: Success in engineering is not just about recording an accident; it is about preventing a vehicle from falling off a cliff. Standards must be revised to stop vehicles in the worst-case scenario (over-speeding heavy vehicles).

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A Note on Methods and Tools: All observations, ideas, and solution proposals in this study are the author’s own. AI was utilized as an information source for researching and compiling relevant topics strictly based on the author’s inquiries, requests, and directions; additionally, it provided writing assistance during the drafting process. (The research-based compilation and English writing process of this text were supported by AI as a specialized assistant.)