Hazard warning or control devices

摘要

A road cone 10 has upper and lower rings 11, 12 with ring 11 defining top viewing aperture 13, and side walls 15 spaced by viewing gaps 22. There may be lower cut-outs 26. The wall 15 can carry a sign 24. The device 10 may be in the form of a cone with suitable top and/or side viewing apertures.