You really can knit whilst stuck in a queue of tourist traffic at a tollbooth.
I mean, hey, c'mon, it's not like I was doing 60 or something. It was like, inch forward at 2 miles an hour, put foot on break, do another fifeteen purls, inch forward (you get the picture).
Although I was purling. I mean, you don't have to look at your work when you purl, so doing 60 and knitting...OMG.
It could WORK.
(Well, as long as you're not driving in Boston or Chicago, anyway...)