Why Choose YDM Solar Road Stud Solar Road stud solutions Can be Used in road central 5 year life Since 1996 Member of National Traffic Engineering Facility (highway) Standardization(Stipulating and revising standard of road safety products in China) . ATSSA Membership(USA). products ranges: road stud, solar road stud, wired road stud, lane divider, guardrail delineator, delineator post, anti