The meanings are different. The white dotted line is used to distinguish different lanes in the same direction, and the yellow dotted line is used to distinguish lanes in different directions. The applicable environment is different. The white dotted line is usually set on the wider road surface, and the yellow dotted line is usually set on the narrower road surface. Under the condition of ensuring safety, the white dotted line can cross the line and change lanes, but can not turn around. The yellow dotted line can cross the line to overtake or turn around. The difference between white dotted line and yellow dotted line 'yellow white virtual real line' is used to indicate the edge of the carriageway where vehicles can cross the line temporarily. The dotted line side allows vehicles to cross the line temporarily, such as overtaking or turning. Vehicles are not allowed to cross the solid line side.
The yellow line is usually drawn in the middle of the road. Whether it is a single yellow line or a double yellow line, as long as it is a solid line, it is strictly prohibited to cross, such as overtaking, turning, turning, etc. （BaiSeXuXianHeHuangSeXuXianDeOuBie）