Expanded Visibility Challenges Arise with Larger Vehicles: Revised IIHS Approach Verifies Findings
In a significant revelation, a study by the Insurance Institute for Highway Safety (IIHS) and the Department of Transportation’s Volpe Center has uncovered a concerning trend in American vehicle design over the past 25 years. The study, which examined popular vehicles including the Chevrolet Suburban, Ford F-150, Honda CR-V, and Jeep Grand Cherokee, found that the design evolution of SUVs has led to a substantial increase in driver blind spots and a 58% decline in forward visibility within critical near-distance zones [1][2][3][4].
This decreased visibility, particularly in SUVs, coincides with a surge in pedestrian deaths (up 37%) and cyclist deaths (up 42%) in the U.S. over the same period [3]. Larger SUVs with higher and more blunt front ends reduce drivers’ ability to see people close to the vehicle, especially pedestrians and cyclists who are in the near-distance blind zones. This compromised visibility likely contributes to more frequent collisions and fatalities [3].
The IIHS study suggests that vehicle design changes—such as elevated front ends and expanded blind spots—may be a significant factor in the rising pedestrian and bicyclist fatality rates, alongside other influences like speeding and inadequate pedestrian infrastructure [2][3].
The new measurement method used by the IIHS involves a visual mapping technique and computational software that replicates a driver's field of vision. The method is mounted inside the vehicle and rotates to capture a 360-degree image from the driver's point of view [2]. The study found a consistent decline in forward visibility within a 10-meter radius, the average stopping distance at 10 mph, in several high-volume models [3].
For instance, the 2000 Chevrolet Suburban offered 56 percent visibility in front of the vehicle, while the 2023 model allowed for just 28 percent [3]. Sedans like the Honda Accord and Toyota Camry experienced smaller declines in forward visibility, with a dip of only five to eight percentage points over two decades [2][3][4].
The Ford F-150, already impaired by limited visibility in the late 1990s, dropped further, from 43 percent in 1997 to 36 percent by 2015 [2]. The Honda CR-V visibility plummeted from 68 percent in 1997 to just 28 percent in 2022, largely due to the vehicle's higher hood and bulkier side mirrors [3].
The next phase of analysis will look at how blind zones influence driver behavior in everyday settings like driveways, intersections, and crosswalks. Researchers are also exploring how visibility maps could inform consumer ratings or design regulations [3].
David Harkey, president of IIHS, stated that the across-the-board reductions in driver visibility are a cause for serious concern [3]. The findings come at a time when pedestrian and cyclist fatalities have risen sharply, raising questions about how vehicle design may be contributing to road deaths.
The researchers aim to expand the scope of the study, applying the new mapping technique to a database of 150 vehicle models [3]. The goal is to determine whether these visibility reductions are widespread and, if so, how they correlate with crash risk and insurance losses [3].
References: [1] IIHS. (2023). Forward visibility in vehicles. Retrieved from https://www.iihs.org/topics/forward-visibility-in-vehicles [2] IIHS. (2023). The impact of SUV design on forward visibility and pedestrian safety. Retrieved from https://www.iihs.org/topics/the-impact-of-suv-design-on-forward-visibility-and-pedestrian-safety [3] IIHS. (2023). Rising pedestrian and cyclist fatalities linked to SUV design changes. Retrieved from https://www.iihs.org/news/rising-pedestrian-and-cyclist-fatalities-linked-to-suv-design-changes [4] Volpe Center. (2023). Forward visibility in SUVs: A 25-year analysis. Retrieved from https://www.volpe.dot.gov/sites/volpe.dot.gov/files/documents/2023/forward-visibility-in-suvs-a-25-year-analysis.pdf
- The Insurance Institute for Highway Safety (IIHS) and the Department of Transportation’s Volpe Center study suggests that the design evolution of SUVs, such as elevated front ends and expanded blind spots, could be a significant factor in the increasing pedestrian and bicyclist fatality rates, alongside other factors like speeding and inadequate pedestrian infrastructure.
- The IIHS study, which involved a visual mapping technique and computational software, found a consistent decline in forward visibility within a 10-meter radius, the average stopping distance at 10 mph, in several high-volume models like the Chevrolet Suburban, Ford F-150, Honda CR-V, and Jeep Grand Cherokee.
- For example, the 2000 Chevrolet Suburban offered 56 percent visibility in front of the vehicle, while the 2023 model allowed for just 28 percent. Similarly, the Honda CR-V visibility plummeted from 68 percent in 1997 to just 28 percent in 2022.
- The new research on general-news and health-and-wellness platforms highlights the concern of David Harkey, president of IIHS, about the across-the-board reductions in driver visibility and their potential link to rising pedestrian and cyclist fatalities.
- The ongoing study by the IIHS aims to expand its scope, applying the new mapping technique to a database of 150 vehicle models to determine whether these visibility reductions are widespread and, if so, how they correlate with crash risk and insurance losses in the automotive industry, technology, and finance sectors.
