I can still drive, & need to - for work service calls. I have to go to my customers who have problems to be fixed in their homes or businesses. I can still drive a ways, Yesterday I drove 2-1/2 hrs (about 200 miles) to my youngest's college to see him for the day, have dinner, & drove back last nite. My wife drove down, I drove back.
It was a tiring day, but I still can do it, when necessary.
My #2 son is a quadriplegic. There's a site for those who have spine injuries and are paras or quads- its called the CareCure Community and has a lot of info regarding hand controls for driving, and where to get them . The site is at :
http://sci.rutgers.edu/
I'm sure you can get quality info there.