US-36 drivers: Since you’re new to these lane markings, I’ll clue you in on something that California drivers have known for a while: DO NOT CROSS DOUBLE WHITE LINES!
do not do this
Double white lines are the same as double yellow lines in regards to crossing them: DON’T DO IT! The only difference is that the white color indicates that traffic is flowing in the same direction, while yellow indicates traffic flowing in the opposite direction on either side of the line.
Hopefully this information will help you avoid a traffic ticket when entering/exiting the HOT lanes.
Source: Where do I find the Colorado state law that states crossing a solid white or double white line is illegal? - Quora