I don't know I just watch for the main clues before the ride and memorize the main highway roads and exit numbers, follow the signs and if at some point I have doubt I just stop by the side or take the next exit, remove one glove and check on the smartphone.

I think my security would be compromized if I had to look at a screen regularly while riding my motorbike.

I'd say a better option is to use a headset and follow vocal instructions.