Tag Archives: LPD+

Lateral Protection Device+ Performance Standard = Prevention of Side Underride Tragedies

Safety Advocacy, Truck Safety, , , , , ,

On January 18, 2024, engineers and underride experts gathered via Zoom to expand the Consensus Side Guard Standard, developed by TEAM Underride in 2020, to specifically address the protection of All Road Users — that is, not only the occupants of passenger vehicles but, also, pedestrians, bicyclists, motorcyclists and other Vulnerable Road Users. In 2022, the term, Lateral Protection Device PLUS or LPD+, was coined*, and now the goal was to create language for a performance standard which such a device should meet.

We had gotten a good start on this process in December 2023. We continued that invigorating discussion and wordsmithing, and this is what we came up with to define the requirements for a Lateral Protection Device PLUS, or side impact guard, on a Commercial Motor Vehicle:

A side impact guard shall be considered to meet the performance standard if it is able to:

  1. prevent intrusion into the occupant survival space of a mid-size vehicle when the Commercial Motor Vehicle (CMV) is struck at any location along its side, at any angle, and at any closing speed up to and including 40 mph, and
  2. prevent a Vulnerable Road User (VRU) from passing underneath the CMV in an interaction along its side.

It is our hope that this process will ultimately result in collaborative action among diverse stakeholders, including government and industry, to develop a voluntary consensus standard which can guide rulemaking and catalyze timely, widespread adoption of underride protection on the sides of large vehicles as envisioned by the Department of Transportation in 1969. For the saving of many lives.

* The term LPD+ was suggested by Garrett Mattos on December 2, 2022, during a Zoom discussion among underride experts and advocates collaborating together as TEAM Underride to advance the implementation of engineering devices to prevent Death By Underride for All Road Users.

LPD+ Saves Lives; But what’s an LPD+?

Safety Advocacy, Truck Safety, , , , , , ,

Words have power. Words convey meaning. Let’s choose words which will enhance understanding and catalyze life preserving action.

Take the word #underride for example. How many people realize that an underride guard is a “simple” engineering device which — if properly designed and installed — can prevent a passenger vehicle, as well as pedestrians, bicyclists, and motorcyclists, from ending up under a truck in the event of a collision?

For over a century now, despite industry and government awareness of the problem, underride tragedies have been allowed, for the most part, to go unchecked. Amazingly, a 1915 patent for a safety device to prevent side underride predates the first patent for a traffic signal filed in 1922:

“Safety Device for Motor Vehicle” to prevent side underride, 1915 Patent

Unfortunately, there has been too much confusion about the gaping space below a truck’s floor which leads to horrifying injuries when there are collisions with the front, side, or rear of a large truck — not to mention too little action taken to correct that dangerous design. One misunderstanding that I’d like to clear up relates to side underride.

Lateral Protection Device (LPD) is a term coined for equipment installed on the side of a truck to prevent Vulnerable Road Users (pedestrians, bicyclists, and motorcyclists) from being swept under. It is not designed to stop a passenger vehicle from going under. A Side Skirt is a relatively flimsy device, which is designed to improve aerodynamics and save fuel; it is not designed to prevent underride. A Side Underride Guard (SUG) or Side Impact Guard (SIG), on the other hand, is designed to prevent a passenger vehicle from going under a truck. Thankfully, it will also protect Vulnerable Road Users from being killed under a truck. And, by the way, it adds to the fuel savings of side skirts.

That is why a SUG or SIG can rightfully be called a LPD+; it does what an LPD is meant to do — and so much more. Why on earth would we require or install equipment on the U.S. fleet which is less effective than a LPD+ that is designed to protect All Road Users? *

Unbelievably, all we have at present is a patchwork quilt of underride standards, or lack thereof, in this country. It’s high time that our nation’s highway traffic safety agency step up to the plate. @NHTSAgov, make wise and timely use of the Advisory Committee on Underride Protection to provide guidance which appropriately defines and regulates underride devices — thus fulfilling your mission to reduce emissions and save lives. Otherwise, we can expect more of the same: Death By Underride day after day, year after year.

Underride Guards Save Lives

* The term LPD+ was suggested by Garrett Mattos on December 2, 2022, during a Zoom discussion among underride experts and advocates collaborating together as TEAM Underride to advance the implementation of engineering devices to prevent Death By Underride for All Road Users.