(NBC) - More teens die in car crashes than from any other cause, yet many teenagers are not protecting themselves by buckling up with a seatbelt.
They either simply forget, or they don't want to mess up their clothes.
19-year-old Alexa Johnson was killed instantly when she lost control of her truck last year. She had failed to wear her seatbelt - a fact that still haunts her father.
About 2,500 teenagers die each year in car accidents.
Safe Kids Worldwide surveyed 1,000 teenagers about their seatbelt usage. A quarter don't buckle up every time for a variety of reasons - they forget, or say they're not going that far.
For whatever reason, Alexa chose to sit on top of her fastened seatbelt, tricking the truck's safety system that would have triggered a beep, had the driver's belt not been buckled.
Her family now outfits seatbelts with pieces of fabric to remind others to use them the right way.
The survey also suggests many parents are not setting good examples of safe driving. Kids who do not buckle up often have moms or dads who do not buckle up.
More than a quarter of surveyed teens said they'd witnessed a parent exhibiting another unsafe habit - texting while driving.