What is the difference between double yellow and double white lines?

Answer 1

White Lines: these separate lanes going in the same direction- if BROKEN, you can pass, merge, or cross over them. If SOLID, usually, shouldn't cross or pass over them.

Yellow Lines: these separate lanes going in different directions- If BROKEN you can pass or cross; if SOLID you shouldn't cross or pass over them.

Double Yellow with One Solid Line and One Broken Line: In this case, you can pass IF the BROKEN half of the line is on your side of the road. Otherwise, you can't pass over the line.

Make sure to check an official driver's handbook from your local DMV for more information on the variations to rules and the specifics of said rules.