If your talking about the Strip traffic, I would say its probably similar to driving in NYC (don't know where your from, or if you've ever been there) but I would not drive in it. Lots of buses, taxi's, people crossing the street, we never rent a car there, it's easier to walk or take a cab. As far as real "traffic" goes, it would say avoid the hotels at the time shows let out, or when people are arriving for shows. Driving seems like more trouble than it's worth there.