功能：

a:阻拦功能：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。

function:

a: blocking function: block pedestrians/bicycles/motor vehicles trying to cross the road. it requires the guardrail to have a certain height, a certain density referring to the vertical bar&a certain strength.

b: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。

b: warning function: the outline on the guardrail shall be concise&clear through installation,&the driver shall pay attention to the existence of guardrail&pedestrians&non motor vehicles, so as to prevent traffic accidents.

c: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。

c: aesthetic function: achieve harmony&coordination with the road environment through different materials, forms, shapes&colors of guardrails.

d:反光效果：由于采用s型栅栏板45角的焊接,从而改变了反光膜反光的角度，夜间车辆行驶时，在车灯的照射下,反光膜的平面正对于行驶车辆，使反光膜达到反光。

d: reflective effect: due to the welding of 45 corners of s-shaped fence plate, the reflective angle of the reflective film is changed. when the vehicle is driving at night, under the irradiation of the lamp, the plane of the reflective film is facing the driving vehicle, so that the reflective film can reflect light.