Mix brown & white sugar in a bowl, add soften butter, then mix in vanilla & two eggs. Blend until smooth. Add salt, baking soda & powder, mix. Add flour, mix. Last add chocolate chips & mix a bit more.
I was stuck in traffic, so I got a chance to really check out the rumble strips. They're simple but really well designed. I love design like this. Putting function first makes things work better and they end up looking better too.
I know they've helped me before, and probably lots of other people too. I bet they've saved a ton of lives.