Marianne Karth and Lois Durso are two mothers on a mission to prevent truck underride collisions. Underride crashes — when a car collides with a truck and gets lodged underneath — are among the most fatal types of accidents on the road. A vehicle's passenger compartment is often crushed or ripped off.
In 2004, Durso's daughter — Roya Sadigh — was driving in a blizzard the night before Thanksgiving, when her car skidded out of control and slid under the side of a truck trailer. Roya died instantly.