It's basically against the law anywhere you go to hold on to your phone and also drive, so your best bet is to have a great magnetic phone mount.
But certain mounts could be pretty tedious, and a great permanent magnetic mount makes life a whole lot better when you're getting in and out of the car. Oliv are the most effective magnetic car mounts for the phone!
These are the most effective magnetic car mounts for ones iPhone. They'll keep your phone from your hands while you're a car (and hopefully prevent a ticket), and they'll let a person check directions and more on the go.