- The car seems to be accelerating and decelerating for no apparent reason (they slow down as you approach a green light).
- The car is swerving (by the way, that's not how I thought you spelled that word) within their lane, and sometimes into other lanes... can't keep a straight line? Texter alert!
- They just don't seem to be paying attention to the world around them (they slam on the breaks when they realize what they're about to do)

Anyway, me yelling at them from within my own vehicle doesn't seem to have much affect, so I'm glad the governator decided to put some legislation into effect that will make it illegal to text and drive (in addition to already being able to hold the phone to your ear and drive -- hooray for hands free).
For more info, check out this article.
Although, I do think it's funny that the article states that this law is completely unnecessary since it's "common sense." While I would agree that it should be unnecessary since we should be able to assume no one would do such a thing -- I think we all know how many people use common sense!