My car is from 1977 and has no form of sat nav, yet I manage without it. It's not hard.
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I'm always amazed to get into someone's car, in the town or city where they live, and see them fire up turn based navigation. Has the availability of turn-based navigation allowed some of us to avoid ever learning basic wayfinding?
I will use navigation for traveling in places I'm not familiar with, but I don't do that very often. And quite often I can look at the map before I leave and get to my destination just fine without turn-based navigation. When my family is traveling together, my wife and I take turns driving and navigating. It's amazing how often the turn-based stuff steers you wrong... especially when there are many options (some good and some terrible) to get through a congested area. If I'm by myself, I set it up before I leave and then it taps my Apple Watch to alert me to upcoming turns.
These days I know that many people use apps like Waze on their daily commute... not for directions, but to send them traffic alerts or to suggest alternate routes based on crowdsourced traffic information. While Waze does warn you that it should not be used while driving, the very concept encourages you to engage with the app by posting warnings about traffic congestion, police speed traps, dangers on the road, etc. You can even text other Wazers who are traveling in your vicinity to see if they can give you more detail about what's happening ahead. This is all well and good when you have a passenger using the app, but how many Wazers are running their own detailed morning traffic report from behind the wheel? Waze is one of those things that is a great idea, and my wife and I have used the app very successfully for navigating traffic in cities we are visiting like Los Angeles and Seattle, but it's also an app that is ripe for abuse.
As you say, it's possible to get around without such conveniences, but humans have a knack for finding ways to multitask while driving. When I was learning to drive in the 1980's, I remember the warnings about applying makeup or using an electric shaver while driving, but the biggest warning targeting young drivers (apart from don't drink and drive) was to stop fiddling with the radio or fishing for cassette tapes under the seat. Back then you would occasionally see people unfolding giant paper maps while driving, or reading a novel while driving in heavy freeway traffic. I know it sucks to live and work in a place where you might spend an hour or more driving in heavy traffic (I did that for about two years), but listening to a podcast or an audiobook is a much safer way to deal with it. Even in my small city, where most car trips are under 15 minutes, people seem to have a hard time making it from A to B without texting. I get around mostly by bicycle, so I pay close attention to what drivers are focusing on... because I really need them to see me. That's why I'm all for officer's enforcing distracted driving laws.
Sean