I just tried it tonight and it isn't easy. I was making a three hour trip home and got diapered up before I left. When I first felt an urge to pee I tried to relax and it would not flow. Then I tried to push it out and wond up pooping before I was able to pee. After I exited from the turn pike and drove some back roads the pee started to flow easier, but I still had to push, I could not get it to flow. I found that it was easier to pee when stopped for a light or stop sign. I have peed and pooped in the car before but not in a long time and I forgot how hard it was to do. It felt good driveing home in a wet messy diaper.