The three lines in the middle of the road are red, yellow and blue, representing tourist routes. This red, yellow and blue line highway, also known as "Rainbow Highway", was first put into use in Changzhou City, Jiangsu Province, and soon became the iconic image of local tourism, which promoted the development of tourism. With the popularity of "Rainbow Highway", many tourist cities also paint their tourist routes in three colors. Therefore, the place where you can see the "Rainbow Highway" is the scenic tourist area.

Rainbow Road:

Taiyuan Dongxishan Tourist Highway is called "Rainbow Road on the Cloud" by netizens. Taiyuan Dongxishan Tourist Highway was built by Shanxi Xiyuefa Group, connecting 9 scenic spots, 10 cultural protection units and 4 traditional ethnic villages along the way, radiating more than 100 tourist attractions. This 229.5-kilometer-long tourist highway will build a landscape corridor integrating green ecology, carrying human history and inheriting Sanjin culture, and become a good place for citizens to relax and a road to get rich in villages along the way. The east-west mountain tourist highway in Taiyuan is an important infrastructure for cycling events around Taiyuan International Road. Red and blue roads surround the mountains like rainbows, and become a popular choice for cyclists.