do you text or call her after you get to work or before you leave for work? That was one thing my wife asked me to do so I do it. I also wear a RoadID as well.
I also upped the life insurance so she will be taken care of if something does happen.
You might also consider giving her the number of a coworker so if she does not hear from you in the morning, she can call this person.
Share your route with her as well. I have directions for her, showed her, and GPS file for her if something does happen. And if I go off the route, I let her know.
Its all about piece of mind.