Sansi Information Board for the world's largest diameter single-tube double-deck road tunnel
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In the world's largest diameter single-tube double-deck road tunnel, the bright LED lights are matched with the bright lights. The steering arrows, the oscillating markings, the speed limit signs, the guiding signs and the lane lights are clearly displayed to the passing vehicles. Waiting for the traffic safety sign enables the passing vehicles to drive safely and ensure the smooth passage of the tunnel vehicles. These information boards come from Shanghai Sansi, the largest LED display manufacturer in China. 
Shanghai Sansi provided 55 sets of lane indicators, 3 sets of energy-saving gantry-type intelligence, 7 sets of energy-saving tunnel internal information boards, 6 sets of full-point speed limit signs in energy-saving tunnels, and speed limit outside the tunnel for the Slender West Lake Tunnel Project. Three sets of signs and three sets of traffic lights provide almost all intelligence display equipment throughout the tunnel. The use of a full set of information display equipment ensures the safety and smoothness of driving in the tunnel.
The Sansi Information Board has powerful display functions, a variety of patented designs, high reliability, and resistance to harsh environments, and the display effect is excellent. Lane indicator used in the tunnel The induction screen has significant advantages such as visual display, large amount of information, relatively short viewing time, and guidance for drivers who are unfamiliar with road conditions. In addition to tunnels, it is also widely used in highways, giving clear guidance to drivers who are not familiar with the road.
The Sansi Information Board is widely used in highways, tunnels, urban trunk roads, etc. across the country, occupying more than half of the domestic LED information boards. Sansi is one of the earliest companies in the domestic LED industry, and is one of the few R&D-type LED companies in the world. It has ranked first in the national LED industry for ten consecutive years. (This article is based on Shanghai Sansi submission) 