The design of the signaling device is based on the chassis of a typical truck trailer with GVW of 1500kg. A board is equipped with a set of halogen lamps. The transportable signaling device consists of: – a closing board U-26a with red and white stripes made of reflective foil type II, for marking objects located at the edge of the road. The board is separated and folded in its top part to obtain horizontal position for transport, – halogen yellow warning lights mounted on the top of the board – truck trailer with GVW of 1500kg, – remote control for arrow sign C9/C10 and lamps – rotating sign C9/C10 with electric actuator. The trailers with closing boards U-26a and various degree of automation, produced by WIMED, are among the best of its type offered in the domestic market and are characterized by: – innovation – stability and durability of the structure, – the use of modern electronics in control circuits, – high reliability. The trailers used for devices have a certificate of approval and are prepared for registration.