As I was waiting for my bus during my commute home today, a guy out for a run passed me. I then saw him stop at the next intersection due to a red light. Rather than stop completely, he ran and hopped in place until the light turned green and he could continue.
There is no reason to do this. I have mentioned previously, one of the best things you can do is get used to stopping and then having to start again. This will help you when your shoelace comes untied, for a bathroom break, or to fill up your water bottle.
There was a time, that when I stopped, it would ruin the rest of my run. I would have to walk/run the rest of the way. Now, I am able to extend my runs because I am able to get back out there after stopping.