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double solid white lines
yes, a yellow line does sepate traffic moving in different directions , the solid yellow line means you can not pass but if its a broken yellow line then you can pass. a white line creates two lanes moving in the same direction.
yes
yes
It seperarates the direction of traffic flow
Traffic in the lane opposite the yellow line travels in the opposing direction.
The patterns are made by the direction of travel of the lawnmower or roller. The dark lines are the machine moving toward you and the light lines by the machine moving in the other direction. This is caused by the light reflection on the grass.
A real life example of a line is lines painted on the roadways. These lines divide traffic. Lines are also found on graphic prints and sport fields.
Broken Yellow lines
The spectral lines move towards one direction, or towards the other direction, depending on the relative speed.