I had a similar commute. If you have a CD player in your car, go to iTunes and listen to some of the awesome weight loss motivation podcasts they have. You can burn CDs from playlists you create on iTunes and use them to motivate yourself for health and weight loss.
Once you're at work, just try to move more. One change I've made to my home computer is to elevate the keyboard and monitor so I have to use the computer standing up. This is a big change from being sedentary for hours. At first, my feet hurt. It got better.
Also, you can see if your company would allow a WW group to meet. I don't know if you'd ever do Weight Watchers (I do) but having a support group at work is very convenient and effective. I know an overweight married couple who both lost weight when the husband got into the workplace WW group and his wife followed the plan while being a stay-at-home mom.