Where are the lines?

One day a young lady from the city was driving her 2 aunts and cousin to their house.
When the young lady got on the dirt road that the ladies lived on she was all over the other side of the road.
The aunt that was sitting in the front asked her why was she all on the other side.
The young lady said Where are the lines then?
The aunt said, Its like the equator, just because you cant see it doesnt mean you cant imagine its there!