I don't know if this is true, but I'd like it to be and therefore haven't Googled, but allegedly the Australian aborigines used to have maps based on songs, where they would sing about the locations next to each other. Today's Western pop music has something slightly similar in the form of songs like 'Twenty-Four Hours From Tulsa' and Simon and his performing Garfunkel's 'America'.
People often have music on in the car as well as using satnav. One problem with satnav is the temptation to look at directions, although obviously it has a voice. Why not, therefore, combine the two and have songlines recorded? Oft-travelled routes could become old classics with time, and as you root onto and branch off of the motorways/freeways/Autobahn, you branch off into local verses. The style of the music could also vary according to the region you're driving through, with Bluegrass for Kentucky, Cajun for Louisiana, BAPP- like sounds for the Ruhrgebiet, Wagneresque opera for Bavaria and Fiddler's Dram for Bangor (North Wales).
As you travel these regular routes, the songs will become familiar to you and with time you will be able to sing yourself along the directions without the help of devices (other than your vehicle), and as music they will be more memorable than spoken directions. You would also be able to give other people directions by singing to them.
If you can sing that is.-- nineteenthly, Oct 14 2018 GPS-enabled_20iPod_...20track_20selection Not dissimilar technology [hippo, Oct 16 2018] "Is this the way to Amarillo...?"-- 8th of 7, Oct 14 2018 No, San Jose.-- nineteenthly, Oct 14 2018 In the Ghetto Going underground Waterloo sunset-- jonthegeologist, Oct 14 2018 //Fiddler's Dram for Bangor (North Wales)// I can't see that being necessary. Bangor is a place you start from, rather than heading towards.-- MaxwellBuchanan, Oct 16 2018 No song could be dreary enough for Edon Ohio.-- RayfordSteele, Oct 16 2018 My friends who navigate by train of thought might find interruptions disconcerting.-- reensure, Oct 17 2018 random, halfbakery