In the United States, it means "you may pass."
A solid yellow line next to a broken yellow line on a divided highway indicates that passing is allowed for traffic next to the broken line but not for traffic next to the solid line. This means that vehicles in the lane next to the broken line can legally overtake and pass, while those in the lane next to the solid line must remain in their lane and cannot pass. This configuration helps manage traffic safely by clearly delineating where passing is permissible.
divided highway
no passing
It separates two lanes traveling in the same direction
it means you can not pass people
No passing.
It means that your lane cannot pass.
A double solid yellow line in the center of the highway is there to separate the two directions of traffic. In most cases, you should not cross that line. On a two-lane road where passing is allowed, one line (or both) will usually become a dashed yellow line. Some locales do not allow turns off the highway across a double yellow line.
two different lanes
you cannot cross over.
No passing when driving in that direction while it is solid.
No passing, when it is on the other side you can pass.