https://www.forbes.com/sites/petercohan/2013/06/11/four-reasons-for-google-to-buy-waze/#20566097726f
“The same occurs with Google Maps, Apple Maps and your cell phone 100% of the time with your carrier. Get over it, you constant position is already tracked and there is nothing you can do AND still have your phone with you.”
A few years ago, Free Ways in the SF North Bay area started showing estimated driving times from point A to B to C and to ?.
How they did that was simple.
They followed your vehicle and others with Fast Pass or whatever tracking signal your smartphone or vehicle was transmitting.
I am not positive about this, but you could go into Settings /Apps/Permissions for Google Maps and turn off/on GPS as needed. Wouldn’t that work?