WASHINGTON (WUSA9) — Truck underride accidents are one of the most horrific accident on our highways.

RELATED: Moms push tractor-trailer law as underride deaths are at 10 year high

Rear and side underride collisions happen when a passenger vehicle slides under the rear or side of a tractor trailer in a crash often decrepitating the people inside.

Since the start of 2018, 20 people have died from underride accidents. Now, two moms are taking their fight up to Capitol Hill.

RELATED: Mothers fight for tougher tractor trailer laws after daughters die in underride crashes

Marianne Karth and Lois Durso both lost children in underride accidents. They successfully lobbied to get bi-partisan legislation introduced in December.

The Stop Act of 2017 sits in the Commerce, Science and Transportation Committee.

Want to know more? Check out their online petition here: Care2.org