It's probably not a good habit, but I've had success carrying my phone in my right front jean pocket on my (relaxed sitting) cruiser. But when I wear my jacket (probably another bad habit, but some summer days can be unbearable on an air cooled engine), it's in the left inside zippered pocket as mentioned above .
When I use it as a GPS, I go only by voice directions and Apple watch taptic buzzes. In summer months there is too much glare on the screen, and I don't like taking me eyes off the road (yeaa a good habit!).