45 min commute to work - any in car exercises??

i don't think snacking is a bad thing. Depends on what you're snacking on. For example i tend to eat grapes while driving it solves thurst and hunger.

This is kind of strange but while driving you can do reps of tightening your glutes and holding for about a minute or more. Also, deep breathing, like breathing in through your nose so your stomach fills up and then slowly releasing your breath pulling your stomach in is just good. For me, its best only drink coffee, tea or mostly water while driving. I do like the cheddar popcorn, too, so I wish I could eat. Maybe take a 10 minute break at work and have half a bag with some apple slices. That way youll satisfy that craving. I noticed a co-worker always takes a break to eat something about 3:30, and a couple of us have started doing that as well. Sounds like you may not have the free time to do that.

When you're driving, please focus on DRIVING.

Save the "in car exercise" for when you're in the passenger seat (or backseat!)

If you keep two hands on the wheel you won't be snacking anyways...

I have a similar commute but I echo the comments that suggest focussing on the road rather than some other activity.

If snacking is an issue, then maybe try eating something healthy BEFORE you leave for your commute, that way you are less likely to snack on something unhealthy - which foods that you can easily eat whilst driving tend to be. Th mid-afternoon snack recommendation could be a good thing, although I tend not to get hungry enough until around 5-ish.

Not really an exercise for the body, more like an exercise for the mind, focus on the road. In lieu of that please let the rest of us know where an when you'll be driving so we're no where near you and your 2,000 pound death trap.