Deja Pseu's post on driver's phone use inspired this related post, which I could write in just three words: Just Get Out.
My real estate agent told me that she was a passenger in a builder's truck when he texted nonstop while driving to Home Depot–and back.
In a cab, the cabbie never stopped talking on his handheld mobile phone, while maintaining a second conversation with the dispatcher.
A friend apologized that "just this once" she had to check on her child's test results, via a text sent while flying down a six-lane expressway.
We don't have to be all blaming and stroppy. Make a polite, neutral request, "Please, could you wait till we're there?" to start. If there's no result, make an immediate, certain exit. Tell them you care about their safety, too.
I'm doing it; it's the same tactic I use in cabs that have missing or broken seatbelts. (There is always an excuse that the previous customer "lost" or broke the belt.) I pay the fare to that point, no tip, and tell them why the trip's cut short.
Remember when we used to carry $20 in our wallets in case we had to get home safely from a party? Tuck a few Just.Get.Out. bills in there.
As I said to Pseu, I witnessed a death caused by driving and phoning, and it's one too many, a 24 year old young woman who passed me one rainy early morning, speeding and chatting, then missed a curve.