交通道路护栏按功能分大致分为四个类别：
Traffic road guardrails can be roughly divided into four categories based on their functions:
1、道路护栏分隔功能：交通道路护栏将机动车、非机动车和行人交通分隔，将道路在断面上进行纵向分隔，使机动车、非机动车和行人分道行驶，提高了道路交通的安全性，改善了交通秩序。
1. Road guardrail separation function: Traffic road guardrails separate the traffic of motor vehicles, non motor vehicles, and pedestrians, longitudinally separating the road on the cross-section, allowing motor vehicles, non motor vehicles, and pedestrians to drive separately, improving the safety of road traffic and improving traffic order.
2、阻拦功能：交通道路护栏将阻拦不良的交通行为，阻拦试图横穿马路的行人或自行车或机动车辆。它要求护栏有一定的高度，一定的密度（指竖栏），还要有一定的强度。
2. Obstruction function: Traffic road guardrails will block bad traffic behavior, blocking pedestrians, bicycles, or motor vehicles attempting to cross the road. It requires guardrails to have a certain height, density (referring to vertical barriers), and strength.
3、警示功能：通过安装要使护栏上的轮廓简洁明快，警示驾驶员要注意护栏的存在和注意行人和非机动车等，从而达到预防交通事故的发生。
3. Warning function: By installing, the outline on the guardrail should be concise and clear, warning drivers to pay attention to the existence of the guardrail and to pedestrians and non motorized vehicles, in order to prevent traffic accidents.
4、美观功能：通过护栏的不同材质、不同的形式、不同的造型及不同的颜色，达到与道路环境的融洽和协调。
4. Aesthetic function: By using different materials, forms, shapes, and colors of guardrails, it achieves harmony and coordination with the road environment.
可见，城市交通道路护栏不仅仅是对道路的简单隔离，更关键的目的在于对人流、车流明示与传递城市交通信息，建立一种交通规则、维护交通秩序，使城市交通达到安全、快捷、有序、畅通、方便的效果。
It can be seen that urban traffic road guardrails are not only a simple isolation of roads, but their key purpose is to express and transmit urban traffic information to the flow of people and vehicles, establish traffic rules, maintain traffic order, and achieve the effect of safety, speed, order, smoothness, and convenience in urban traffic.
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外观美观：具有白、蓝、红、绿等多种颜色，色彩艳丽、表面光滑、手感细腻,可与其他材料护栏组合使用。
Beautiful appearance: It has multiple colors such as white, blue, red, and green, with bright colors, smooth surface, and delicate touch. It can be used in combination with other materials for guardrails.
护栏质量：道路护栏选用国产一级PVC原生料,产品表面光洁度好,色泽质感优,强度高,耐老化,具有较强韧性的优质产品,确保此种道路护栏10年不褪色。
Guardrail quality: The road guardrail is made of domestically produced first-class PVC raw materials, with good surface smoothness, excellent color and texture, high strength, aging resistance, and strong toughness. It is a high-quality product that ensures that this type of road guardrail does not fade for 10 years.