CHONGQING (CQNEWS) -- The white clouds on the dome are ethereal, and the beauty changes in the four seasons on both sides... The pure hand-painted landscape section in the Chengkou – Kaizhou super long tunnel of Chengkou – Kaizhou expressway is about to be unveiled. This is the first pure hand-painted tunnel landscape section of highway tunnels in China, and it is also the first 4D landscape expressway tunnel in China.

Chengkou – Kaizhou super long tunnel, with a total length of about 11.5 kilometers, is the longest expressway tunnel in Chongqing.

In the super long tunnel space of 11 kilometers, drivers and passengers are prone to visual fatigue. In this regard, the consulting company of Chongqing Expressway Group has set up four landscape widening sections in the Chengkou – Kaizhou super long tunnel to enrich the landscape level of the tunnel, so as to alleviate the visual fatigue of drivers and improve driving safety.

According to the relevant responsible person of the project implementation unit China Merchants Chongqing Transportation Research and Design Institute Co., Ltd., each of the four landscape sections is 100 meters long, and 40 meter transition sections are set in the front and back respectively. Among them, the full arc of the tunnel is painted with 3D naked eye, and the landscape characteristics of Chengkou and Kaizhou are painted on both sides to create rape flowers in full bloom in spring, Hanfeng Lake in summer, colorful leaves in autumn, snow mountains and clouds in winter, showing the natural scenery of spring, summer, autumn and winter, as if through the four seasons.

At the same time, the undulating mountain shaped 3D three-dimensional foreground is set in the tunnel landscape widening section, which improves the color changing landscape lighting atmosphere in combination with light and shadow changes. Sound equipment is also reserved to simulate the bird singing in the environment, forming a sound-light-electricity 4D landscape, and further creating a comfortable and safe driving environment.