Using a GPS requires poking at your GPS screen -- have you ever been in a cab with a hands-free GPS? Do you think that when a cabbie without a current fare gets radioed with a pickup location, he pulls over to enter the address in his GPS?

Ideally, cabbies and Uber drivers make all their necessary communication noodling while stopped, in between fares. In reality, both frequently distract themselves with both the necessary navigational/fare stuff they have to do with phone/GPS/meter and unnecessary calling/texting besides.