Depending on where you are, you can use Curb or something similar to pair with your ride and let the app handle payment. I use it (or just hailing cabs) almost

Depending on where you are, you can use Curb or something similar to pair with your ride and let the app handle payment. I use it (or just hailing cabs) almost exclusively over Uber/Lyft these days, typically 1/2 the price and the drivers don’t get lost in the city either.