WASHINGTON, D.C. — The National Highway Traffic Safety Administration (NHTSA) faces a massive wave of opposition as the public comment period closes on a proposal to mandate side underride guards for heavy trailers. Over 2,000 stakeholders, ranging from individual owner-operators to major industry trade groups, have formally filed concerns arguing that the agency has failed to provide sufficient real-world data or engineering analysis to support such a sweeping regulatory change.
The push for these guards centers on the potential to prevent passenger vehicles from sliding underneath trailers during side-impact collisions. However, the American Trucking Associations (ATA) and other industry leaders maintain that current safety efforts should prioritize accident prevention rather than retrofitting equipment with unproven hardware. With side guards measuring roughly 40 feet in length—compared to the 8-foot standard for rear guards—the mechanical challenges of installing these devices across diverse trailer fleets remain largely unaddressed by the federal government.
The Truck Trailer Manufacturers Association (TTMA) pointed out a glaring flaw in the proposal: the vast majority of current commercial trailer designs, including dry bulk, tankers, and off-road agricultural equipment, have no viable side-guard configuration available. Werner Enterprises highlighted that adding significant weight to trailers could trigger a cascade of operational issues, including increased fuel consumption and potential hazards at railroad crossings or complex docking bays. The Owner-Operator Independent Drivers Association (OOIDA) echoed these sentiments, noting that previous NHTSA assessments correctly identified such mandates as impractical and economically damaging to small-business truckers.
What This Means for Drivers
For the average CDL-A driver, these proposed guards could turn routine deliveries into logistical nightmares. Drivers operating in rural areas or on uneven terrain risk having their trailers hang up on, or sustain damage from, these extended guard structures. Fleet managers are also concerned about the increased weight burden, which directly impacts cargo capacity and fuel efficiency for any OTR truck driver trying to maintain profitability in a tight market. If these FMCSA regulations move forward, the resulting equipment modifications could lead to significant downtime during installation and increased maintenance costs at the shop.
Industry Reaction
The industry consensus remains skeptical of the agency's reliance on limited testing. The Truckload Carriers Association (TCA) expressed disappointment that NHTSA moved forward with the notice despite the market lacking diverse, proven options for carriers. Meanwhile, the Truck Safety Coalition has pushed back against the industry, arguing that the agency's analysis underplays the number of lives that could be saved. Despite this, the overwhelming sentiment from the front lines of the industry is that any mandate must be grounded in rigorous, transparent engineering trials rather than theoretical projections.
Key Points
- Over 2,000 parties, including trucking associations and safety nonprofits, submitted comments on the proposal.
- Current side guard designs are primarily limited to box-type trailers, leaving specialized equipment without a viable solution.
- Major carriers warn that added weight could negatively impact fuel economy and emissions standards.
- Industry groups argue that NHTSA has not conducted sufficient real-world testing to justify the mandate.
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