What happens when a heavy truck rear ends a vehicle at low speed? 

Kineticorp Accident Reconstructionist, David Danaher, discusses our latest research “Low Speed Override of Passenger Vehicles with Heavy Trucks.”  David presented the findings at SAE International‘s 2019 World Congress Event (WCX). A special thanks to Sean McDonough and Drew Donaldson for their involvement with the project.

Publication Introduction:

In low speed collisions (under 15 mph) that involve a heavy truck impacting the rear of a passenger vehicle, it is likely that the front bumper of the heavy truck will override the rear bumper beam of the passenger vehicle, creating an override/underride impact configuration. There is limited data available for study when attempting to quantify vehicle damage and crash dynamics in low-speed override/underride impacts. Low speed impact tests were conducted to provide new data for passenger vehicle dynamics and damage assessment for low speed override/underride rear impacts to passenger vehicles. Three tests were conducted, with a tractor-trailer impacting three different passenger vehicles at 5 mph and 10 mph. This paper presents data from these three tests in order to expand the available data set for low speed override/underride collisions…. Purchase Full Publication

Full Publication:

SAE 2019-01-0430 – Low Speed Override of Passenger Vehicles with Heavy Trucks


David Danaher, Sean McDonough, Drew Donaldson

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