Imagine a theoretical highway where all of the cars except you are totally stopped, and they are all very widely spaced. You could easily weave in and out and

Imagine a theoretical highway where all of the cars except you are totally stopped, and they are all very widely spaced. You could easily weave in and out and make good time. Clearly the ability to freely and easily change lanes is advantageous to a single driver. The problem is, in gridlock, this ability is pretty unlikely.