Car shuts off while driving but than starts up again, does it while in slow traffic or coming to stop lights

No it wouldn't. I really think you need to have the throttle body checked out and cleaned for this.
Could be other things, but poster doesn't state year or engine size.
Help me out to help you out.

Ditto kitch428's recommendation. Try carefully cleaning the throttle plate, throttle body, and any upper and lower ports. Consider cleaning or replacing the Idle Air Control Valve (IACV), replacing the air filter, and adjusting the idle rpm.

Sorry guys. It's a 1992 toyota camry xle v6. I know the o2 sensor needs to be replaced. I'm trying to troubleshoot for a friend. He states it only does this while on an up hill even on small freeway inclines while in stop an go traffic. Better example is if he were to pull up a driveway his car dies??
Please help!

Have you tried my suggestions from last night?

Waiting for my friend to drive here. Then will do all that plus a tune. The basics! Great help though! I don't see where I can "rate" your guys answers, I'm new to this site! But yes you guys have help out a lot

You should see an orange button, titled "Rate this Answer!"

I'm replying where it says answer this question at the bottom then I click on post quick answer. So on "my" end the only ones with the orange button are the boxes with my name/username.

You don't see an orange box titled "Rate this Answer!" for the responses I've already made?

I have a 1999 toyota camry, I had throttle body cleaning, fueled injection, but it still shut s off. Not everday, maybe every two days.