Courtney Graffunder, 21, of Sac City, died as a result of a traffic accident that occurred at 8:52 a.m. on December 14 on Highway 71 north of Early.

Graffunder was driving a 2015 Chevrolet Camero north on the highway and failed to stop for a semi tractor-trailer that was stopped on the roadway, waiting to turn left into the driveway at 1887 Highway 71. Graffunder’s vehicle struck the rear of the trailer. Sac City woman dies after striking rear of semi-trailer with her vehicle

Because the bottom of a truck is higher than the bumper of passenger vehicles, when there is a collision the smaller vehicle easily slides under the truck and the first point of impact is the windshield. Seatbelts, airbags, and car crumple zones do not function as intended in underride crashes — front, side, and rear — leaving passenger vehicle occupants vulnerable to life-threatening injuries.

See Underride Crash Memorials posted here and at #STOPunderrides Tweets. To add photos or more information on this story or to add other underride crashes to be remembered, send an email to underridemap@gmail.com. Please use this Interactive Underride Crash Map Crash Location Input Form to provide us with accurate information . (Note: the map is currently not online; but we would keep the information for future updating and to aid in underride advocacy efforts.)

Support improving Underride Protection on trailers: Contact your legislators with this User-Friendly TAKE ACTION online tool.

How You Can Help

Please sign this petition: Congress, Act Now To End Deadly Truck Underrides.

Note: In order to raise awareness and preserve the memories of underride victims — precious ones gone too soon — I have been writing memorial posts on what appear to me to be underride crashes. I am not a crash reconstructionist, and I do not have all the facts on these crashes; but underride should be investigated as a potential factor in truck crash injuries and deaths.