Words flow out like rain into a paper cup

So I've figured out that I get my best ideas for writing when I'm driving. Does anyone else see the problem with this?

 I can't write and drive at the same time!

I also don't want to pull over to write because that just seems silly and I'm not so good at pulling over on the side of the road. So let's just hope I never get pulled over by a cop. But back to what I was saying. Every time I'm driving I get an idea for a story, but by the time I get home I've thought about 30 different things and can't remember my story ideas! It's really frustrating!