I said I 'somewhat improved' because I was already a great driver
(uh oh...now I gotta watch it!)
Seriously, early on I recognized that driving is the quintessential demonstration of a modern application of the ancient precepts of aikido. Most obvious to me is- that the blending with the car/motorcycle has GOT TO BE the same phenomenon as that with the sword. I (and for most others with whom this has been discussed) get a 'sense' of the boundaries of the car, the 'feel' of the car, and often the energy. This is likely the foundation of a "good driver" as getting a sense of blending with a bokken or jo must be for an aikidoist.