How to set up traffic safety sign?
Go back to the 300 meters. Put it back to the construction site. Other signs, such as speed limits and no overtaking, are displayed as appropriate.
To 500 meters, and then furnishings preface construction 500 meters of warning signs
If it is the construction of security signs, settings are generally a kilometer position, "front construction, vehicles slow" warning signs, road cone is oblique type furnishings.
To be specific, is the highway or an ordinary one or two road
