Abstract: Herein, the effects of landscape belts in 70 highway tunnels are analyzed and their layout modes are systematically summarized. Additionally, comprehensive design suggestions and research prospects are provided. The results reveal the following. (1) Tunnel landscape belts alleviate drivers′ psychological stress and visual fatigue, enhance the overall aesthetics and driving comfort of the tunnel, and promote cultural tourism; however, because of the lack of mature design specifications, the design of tunnel landscape belts is subjective. (2) The layout elements of landscape belts in China′s highway tunnels primarily include painted areas, LED dynamic grid screens, LED landscape light arrays, and projection. Projection and other layout modes of landscape belts are popular choices in tunnels. (3) There is no more than one landscape belt in tunnels less than 10 km, and the length of the landscape belt is set as long as the short- and medi-long-tunnels. (4) Landscape belt lighting and tunnel basic lighting should be designed considering green and low-carbon principles. (5) In future studies, a relationship model between stimulation intensity and arousal level should be established, incorporating multiple factors, for the rational design of the landscape belts.

Key words: landscape belt, highway tunnel, fatigue relief, layout mode, application effect