Engineering Design of an Adaptive Highway Barrier for Sustainable and Safer Road Infrastructure

Traditional highway barriers are primarily designed for road separation and, in some cases, noise mitigation, while roadside air pollution, CO2 emissions, headlight glare, and energy requirements are generally addressed through separate systems. This study presents the conceptual engineering design of an adaptive multifunctional highway barrier that integrates air filtration, CO2 capture–mineralization, acoustic absorption, anti-glare protection, renewable-energy-assisted ventilation, and sensor-based control within a single modular infrastructure system. The design methodology consisted of identifying the main environmental and road-safety requirements, dividing the barrier into mechanical, air-treatment, electrical, renewable-energy, and control subsystems, and subsequently integrating these subsystems into a common modular configuration. Preliminary engineering calculations were used to establish module dimensions, airflow capacity, particulate-matter removal, CO2 capture–mineralization scenarios, electrical-energy demand, photovoltaic capacity, and battery requirements. The proposed module could theoretically process approximately 12,600 m3 of roadside air over a 10 h operating period, while the estimated electrical-energy requirement was 511.2 Wh/day after applying a 20% design margin. Sensitivity analysis was also performed to evaluate the effect of uncertain CO2 capture–mineralization efficiency on predicted system performance. The results demonstrate how a systems-engineering design approach can transform a conventional highway barrier into a multifunctional environmental and road-safety platform. Since the proposed system remains at the conceptual-design stage, the reported performance values represent preliminary engineering estimates that require future prototype, experimental, structural, fluid-dynamic, and field validation.