I hate to say this, but honestly - before my dept. got axed beginning of the year, my job (like most of my jobs over the last 15 years) was as a Field Technician.
Basically entails driving around 1500 - 2500 miles a week, going to all sorts of out of the way towns and such diagnosing, repairing, maintaining and doing new installs of POS (Point Of Sale - and the other acronym works too

) systems for fast food chains.
In this type of job, I am on my cellphone (voice) I would say 1/4 to 1/2 the time I am on the road. Seriously. I am in constant contact with dispatch, directors, stores, equipment sups, hardware dept, support, third party vendors, you name it.
I was never in a single wreck because of my phone. Not even close to one. I was hoever close to a few wrecks because of other people on their phones waving their hands around and not paying attention.
Moral of the story? I think it boils down to whether or not you are able to multi-task, and how distracting the call is. I did pull over at times if it was lengthy or in an area with tons of interchanges I was unfamiliar with. However I just could not have done my job without my phone period.
So does that make me a jerk or a horrible person? I don't know, but if I was offered a job tomorrow that would help pay the bills again and it required me to use the phone like that. I'd do it in a heartbeat. You better believe it. Family comes first I'm sorry.
Take care all,
- Hap