I used to tape maps to the gas tank of my motorcycle on trips.

Then mapquest became useful and I taped printed directions. Made it a lot easier.

Then I got a Garmin waterproof, handlebar mounted GPS and it was glorious, though you had to buy map updates every couple years.

Eventually phones were actually able to be used for directions and I kept a phone connected to a homemade battery pack in my jacket pocket, with an earbud under my helmet, so I just listened to directions and music.

Finally got a phone connected to a handlebar mount, plugged into the bike power, with a Bluetooth headset built into the helmet. Probably the least safe of the options, but I can listen to podcasts, audiobooks, music and see the maps while it directs me with audio, just like a car display would.