Better design could make mobile devices easier for seniors to use

A loud “bing” sounded as we drove onto the highway access ramp. I didn’t see a message on our car’s screen. Was it my phone or my wife’s? Was it a calendar alert, or did one of us receive a text message? Was it the low battery warning on one of our hearing aids? Was it our home security system? Maybe the car needed an oil change or lost tire pressure? Should we stop in heavy traffic or ignore it?