Former Elk Grove mayoral candidate Joel Broussard, 39, was killed in a crash when a big rig collided into 10 vehicles on Interstate 5 in south Sacramento on Tuesday evening.

The crash happened around 5:40 p.m. Tuesday in the southbound lanes of I-5 near Florin Road, the California Highway Patrol said. Man killed, 3 injured in crash on I-5 in south Sacramento

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 — leaving passenger vehicle occupants vulnerable to life-threatening injuries

See underride tragedies at Underride Crash Memorials and #STOPunderrides. 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.

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.