View method of road guide signs: 1. Road guide signs are divided into colors, graphics, blue background, white graphics, white border and blue lining; 2. Classification by function: route-oriented signs, location-oriented signs, facilities-oriented signs along roads, and other road information-oriented signs; 3. Route guidance signs are divided into: intersection warning signs, intersection informing signs and confirmation signs. General road intersection warning signs are mainly used for expressways, and urban roads are rarely set because of the characteristics of high road network density and short intersection spacing. 4. In general, the layout and direction of the notice signs at road intersections are the same as those of the notice signs. The only difference is that the distance information is set on the signboard to inform the driver of the distance between the intersection ahead and the current vehicle position, while the signboard is set 30-80 meters in front of the intersection to remind the driver to choose the driving path correctly.