Two Lane Highway 

When too lines of cocaine are made side by side, and then it is snorted so that one line goes up each nostril at the same time. This person would then be on the Two Lane Highway unti the cocaine wears off.

"Dude I'm on the two lane highway and i cant get off man."

Two Lane Highway by This Guy made it up April 1, 2009

Two Lane Highway 

When a man is in the processing of fucking a woman and fingering her with two fingers at the same time.

"Dude, that girl Katie is so loose I slipped in the Two Lane Highway last night then bitch slapped her and spit in her face.....she loved it."

Two Lane Highway by Numero Two January 20, 2009