I recently watched a comedian whose act included a comment about how you would never act in-person the way you act when you are driving your car. i.e. Hey %^&*! Move out of the way! etc.
I find, however, the times I get MOST upset is actually when I am on foot or on my bike with a child in tow (literally) and I have to deal with inattentive and/or impatient drivers. The presence of my children may raise the overall stress of the situation, but they also keep my comments PG-13.
The best solution I can think of is to simply have more places we can run and ride safely away from motor vehicles. There are many organizations that are working to make this a reality. Two of note are Rails to Trails and People For Bikes. The Bike Lane (the local bike store where I work) is having a contest. If you sign up to pledge on the peopleforbikes.com site, you can be entered into a contest to win a $2000 shopping spree at The Bike Lane or a TREK trip.
Wherever there are safe bike lanes and paths, there safe and comfortable places to run with your jogging stroller!