oh no! In the passenger seat, yes, I have knit there... and I will again.
But in the driver seat? Oh, no!
ok, when I am parked and waiting (like for the ferry this summer... 3 hours!), and in a trafic jam that REALLY stands still.... I might.
My reasoning: when the car is turned off: you can knit. When you are within trafic (even when standing): Knitting (and all other crafts) are OFF LIMITS!
please, keep your hands ready for the wheel.
My brain, though, uses long drives to design knitting patterns, think up technical stuff and work out the most complex knitting questions.