Annaleah and Mary Karth were just teenagers when a crash on Georgia Interstate took their lives last May. Their family vehicle was struck, propelling it under a tractor trailer and killing the two girls.
The Ride for the Constitution and is attracting protestors from as far away at the West Coast.
An effort lead by Fairfax County Police has been serving as a sort of a DUI checkpoint for big trucks on Thursday. Officers pull over random trucks on Route 28 in Centreville, checking if they are fit to be on the road. Officers say up to 50 percent are not safe.