I have occasionally driven off with the parking brake partially engaged, and although I have realized it not too soon after, it is easy to do - especially if the brake is not pulled really tight. To help prevent this I installed a noncontinuous beeper. It does work and although a bit of an annoyance, it is cheap insurance. It took all of 15 minutes to install once I identified the proper wires in the harness. The sound of the alarm can be dampened somewhat to soften the annoyance factor. This is on my RTV X1100C.
