When a 3,000 lb car meets an 80,000 lb truck, physics is unforgiving. Understanding the mechanics of underride crashes is the first step to protecting your rights.
Primary Risk Zones
Interstate 5 & I-84 Corridors
Common Cause
Sudden Braking & Low Visibility
Fatality Factor
Cabin Intrusion
Select a crash type to simulate the mechanical failure.
At speeds over 35mph, standard rear guards (ICC bumpers) often buckle, allowing the hood to pass under and the trailer edge to impact the windshield directly.
Why "defensive driving" isn't enough when mass differences are this extreme.
A fully loaded rig weighs 20x more than a passenger car.
In Oregon's rainy conditions, stopping distances increase significantly. If a truck cuts you off, you simply cannot stop in time.
*Note: Wet roads (common in OR) increase these distances by up to 2x.
Federal tests often check the center of the guard. But if you hit the outer 30% (the edge), the support struts often buckle immediately, providing zero protection.
Trailers stay on the road for decades. Salt and rain weaken the steel welds of the rear guard. A visually intact guard may snap like a twig upon impact.
An underride claim is not a fender-bender. Proving liability often requires bypassing the driver and looking at the equipment, the maintenance logs, and the physics of the crash.
Trucking companies dispatch "Rapid Response Teams" to the scene immediately to control the narrative.
The Electronic Control Module holds critical data on speed and braking. This data can be overwritten or lost if a specialized preservation letter isn't sent within days of the crash.
Don't face the trucking conglomerates alone.
Talk To An AttorneyWant deeper detail first? Read the full underride claim guide