GPS usually works in 2 ways. Those days drive limo - a new BMW
somemore with latest GPS.
Realsied it had 2 features, fastest and shortest.
Fastest - expressway
Shortest - by distance, small roads etc.
Of course doesn't always work that way, but usually so.
So use GPS must be aware, over reliance can cause disputes
because pvte car, you make mistake, it's your own time, taxi, pax
time and he's paying.
Always better to ask, how do you nornally go? Especially for
office workers to and from work, they are not used to deviation,
taking the same route daily.
So ask the pax, explain you're unsure yourself and give them
options. Let them choose the way.
AngMos usually very ok with whatever routes provided you explain
to them. Sometimes I joke with those who are friendly, ask them you
vote Labour or Conservative (if from UK). If Labour, turn left,
Tory - turn right. They are ok.
Only Indian Fts must beware, for me they are last choice anyway.
They expect you to know how to go the way they want to go. They
think you driver, this your job, not for them to teach you. Only
after kena fuck, will they say sorry. Too yaya, ask them to f.o.
Sorry I don't know, you get down now and take another cab. Then
only they will open their mouths to explain.