The Insurance Institute for Highway Safety (IIHS) typically conducts its crash tests at a rate of 40 mph. Although some individuals have questioned why the institute doesn’t perform these tests at higher speeds, especially considering that many American drivers exceed 70 mph on highways, the IIHS has provided explanations for its methodology in a recent YouTube video.
The IIHS utilizes three primary frontal impact evaluations: the Updated Moderate Overlap Test, the Driver-Side Small Overlap Test, and the Passenger-Side Small Overlap Test. These assessments are conducted at 40 mph, a speed that reflects the average speed at which most real-world crashes occur, thus capturing a substantial portion of collision-related injuries and fatalities.
Raul Arbelaez, Vice President of the IIHS Vehicle Research Center, reiterates the importance of testing at this speed, stating, “Our test speed captures the middle of the distribution of real-world crashes, where we know there are serious and severe injuries. We know there are crashes that are more severe, but we are capturing the bulk of the total number of crashes. Most crashes are very low severity.”
When addressing the idea of increasing the testing speed, Arbelaez explained, “Your crash energy increases exponentially with impact velocity, and so if we go from forty to fifty, we’re looking at an over 50% increase in crash energy.” He also mentioned potential negative consequences, such as diminishing safety features for lower severity impacts.
In addition to vehicular safety mechanisms, factors such as roadway design, enforcement of traffic laws, and driver behavior also contribute to road safety. Therefore, a balance is struck with a 40 mph testing benchmark, while research continues to focus on preventing crashes from occurring in the first place.
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FAQ Section
- Why does the IIHS conduct crash tests primarily at 40 mph?
- The IIHS conducts crash tests at 40 mph because this speed represents the average speed of most real-world crashes, which allows them to study impacts where severe injuries are likely and to capture a significant portion of all crashes.
- What would be the consequence of increasing the test speed to 50 mph?
- Increasing the test speed to 50 mph would result in over a 50% increase in crash energy, which could produce unintended effects, such as worsening safety in lower severity crashes.
- Are vehicle safety measures the only factor in preventing injuries on the road?
- No, vehicle safety is just one aspect of road safety. Roadway design, traffic law enforcement, and driver behaviors are also crucial in keeping people safe on the roads.
Conclusion
The IIHS’s decision to utilize a standardized 40 mph speed for the majority of its crash tests is based on scientific evidence and real-world statistics. This speed reflects the conditions in which many serious and severe injuries occur, providing invaluable data to improve vehicle safety standards. Understanding that higher speeds can complicate safety measures and the nuances of lower-speed impacts is crucial for maintaining a balanced approach in vehicle crash testing. The IIHS continues its efforts in research and innovation to make roads safer for all.
