8681 Rigid road safety barriers (11) Rigid road and highway barriers and safety barriers, includes; concrete safety barriers, steel section barriers, energy absorbing and deflecting end barriers. Most common forms are, galvanized steel W-Beam guardrails with C shaped posts. Rigid systems may have other functions such as acoustic barriers (reflection and absorption) 8682 Non-rigid road safety barriers (0) Non-rigid road and highway barriers and safety barriers, includes; cable systems, composite plastic systems, energy absorbing and deflecting end barriers. Most common forms are, high tension cable barrier systems with galvanized deflection posts and transition line posts. Non-cable systems may have other functions such as acoustic barriers (reflection and absorption) 8685 Carriageway delineators (0) Carriageway delineators including, guide posts, delineators, cats eyes and other raised markers 8686 Expansion joints for roading and bridges (36) Expansion joint systems and related items for raised roads, paths, cycleways, also bridge and carpark expansion joints, and bridge bearings etc