Road studs on city roads, factory road road studs, parking lot road studs, underground garage road studs, campus road road studs, living quarter road studs and other construction projects.Expressway: road studs at non-slip ramps, tunnel entrance road studs, emergency lane road studs, high-speed service area entrance and exit road studs, ETC toll lane road studs, ramp road studs, channel line road studs, diversion zone road studs , Guiding arrow road studs.