disclosed is a support post for supporting roadway signs . in one embodiment , a polymer support post is formed of a composition of high density polyethylene — hdpe —, ground rubber and ‘ xlpe ’/ polycure . all these materials may be sourced from recycled materials . additionally , the support may include ultra - violet materials and flame retardant materials . in one embodiment , the ultra - violet materials and flame retardant material are included in recycled xlpe material . one or more support rods may be disposed within the polymer support post . additionally , one or more fragility apertures may extend through the support post to allow the support post to collapse upon impact .