An indicative light unit consists of yellow safety lamps or other yellow light sources. The directional light arrows shall be used for the roadwork to guide the vehicles, the mobile working and the obstacle to the operational change of the direction of the transits. The light arrows can be used independently or in combination with other traffic management tools or mounted on a vehicle.
Guiding Light arrows:
- Trailer, the vehicle (rear/roof), the traffic mark or the post.
- Fixed, manual or automated
- With or without controller
- In additional public: Strobos, Twilight switch