For the purpose of my and other people's safety, I don't want my taxi driver to be constantly looking at the phone at the busiest junctions, neither do I want to explain to them how to spell a given street name so that they can type it in their phone in the middle of a busy street during the rush hour.
It's not "constantly looking at the phone", it's the plain old "using navigation in your car" that many people already do. AFAIK, safe driving with navigation is a long-solved problem.
Simpy by sheer logic the very act of using a navigation aid (phone, Sat Nav, map) must result in decreased attention to the mechanical process of driving.
I would challenge that safe navigation is a long solved problem.
Who solved it? How? How was it measured? When was it solved - 2013? 2004?
Maybe in 2024.