(1) There is no damage or deformation of all types of guardrail structure, and the fastening status of the column and horizontal components.

(2) The degree of pollution and paint condition.

(3) the relaxation degree of the cable.

(4) Defect of guardrail and reflective film

Maintenance and repair

(1) Often remove weeds and other accumulated debris around the guardrail.

(2) The paint on the guardrail surface should be painted in time.

(3) Due to traffic accidents or natural disasters caused by guardrail defects or deformation to be timely replenished or replaced.

(4) Due to the road reinforcement or adjustment of the subgrade profile, so that the guardrail elevation changes significantly, the height of the guardrail should be adjusted accordingly.

(5) Seriously corroded guardrail should be replaced.