A top bar bag is the one thing I haven't tried. Those that I've considered seem to be too large, and inconvenient on a road bike.
One attractive feature of some of them is a transparent compartment on top for the phone, so you could see the navigation for instance. Again it doesn't work for a road bike, but with a more upright setup that's what I'd be looking for.
Originally Posted by
MntnMan62
.... I've thought about keeping the phone and ID on me but if it's in my rear pocket of my jersey, there is always the very real chance that I could end up on my back which could crush the phone rendering it useless....
To agree with this - although OP doesn't really need to justify it - having the phone and wallet in your jersey can do worse than just crush the phone. I broke three ribs landing on it. I had a wallet with it and the force split 2 credit cards in half, somehow ejecting the phone 15 or 20 feet. The phone was fine though.