Roadway barriers, not of metal; traffic barriers, not of metal; crash barriers, not of metal; highway safety barriers, not of metal; non-metal vehicle restraint barriers; non-metal vehicle arresting barriers; vehicle arresting systems comprised primarily of non-metal barriers, restraint nets, and energy absorbers; truck arresting systems; vehicle containment barriers; railway crossing safety barriers; roadway closure barriers; median barriers; portable traffic control barriers, not of metal; ...