A new study from Anidjar & Levine exposes a hidden factor behind thousands of U.S. roadway deaths. While distracted driving, speeding, and impaired driving often dominate safety discussions, the study shows that something far more basic is contributing to a significant share of crashes: worn or malfunctioning windshield wipers.
The analysis reveals that poor wiper performance plays a role in nearly 1.2 million crashes and more than 6,000 fatalities every year. The issue is magnified in states with heavy rain or snow and in states that do not require vehicle safety inspections.
This rewrite explores the study from a policy and infrastructure perspective, focusing on how state level regulations and weather patterns intersect with driver behavior to create a preventable public safety problem.
A National Maintenance Problem with Deadly Outcomes
The study estimates that about 46 million drivers operate vehicles with impaired visibility during bad weather because of faulty wipers. Visibility is central to safe driving. About 90 percent of driving decisions rely on vision, and poor visibility is linked to nearly half of all fatal crashes.
Maintenance failures at scale
- One in five vehicles inspected during National Car Care Month had faulty wipers or washing systems.
- Tens of millions of vehicles on the road have deficient wipers, based on national registration data.
- Drivers often wait years to replace wipers that were already showing signs of failure within six to twelve months.
The study stresses that wipers are not a minor accessory. They are a primary safety device, especially in regions with frequent storms, snow, or dust.
Why Drivers Delay Replacements
The study includes consumer behavior data that helps explain why so many vehicles have failing wipers.
Top reasons for wiper replacement
- Preventative maintenance motivated more than 40 percent of both DIY and DIFM drivers.
- Wiper failure was the reason for 35 percent of DIY replacements and 30.8 percent of DIFM replacements.
- Upgrades motivated more than 20 percent of DIYers and nearly 25 percent of DIFM customers.
The data suggests that many drivers do not prioritize wiper maintenance until failure occurs, which can be catastrophic in bad weather.
Fatalities Directly Linked to Bad Wipers
Between 2019 and 2023, 12 states reported 16 fatalities directly caused by inadequate wipers during adverse weather. Wisconsin recorded the highest number of these deaths and has no safety inspection program.
While the number may seem small compared to national crash totals, the study argues that these are only the cases where wipers were explicitly cited as the cause. The true number is likely higher.
The Regulatory Divide: States With and Without Inspections
The study highlights a major policy gap. Twenty-four states have no vehicle safety inspection requirements at all.
Inspection status overview
| Category | Number of States |
|---|---|
| No inspection requirements | 24 |
| County level requirements | Several (AZ, CO, GA, IN, NV, NM, OR) |
| Biennial inspections | 7 |
| Annual inspections | 10 |
States with mandatory inspections show a 5 to 9 percent reduction in crash rates compared to states without them.
The study notes that the cost of an inspection is modest. Most drivers pay between 20 and 70 dollars per year.
High Fatality States and the Absence of Inspections
The study draws a clear connection between states with high fatality rates and states without inspection requirements.
Examples
- South Carolina has a fatality rate of 24.9 deaths per 100,000 people and no inspection program.
- Arkansas, Alabama, Tennessee, and New Hampshire all rank in the top ten for fatalities by population and have no inspection requirements.
- Eleven states with no inspection requirements have fatality rates above the national average.
The study suggests that even minimal inspection requirements could save lives.
Weather Intensifies the Risk
Weather is a major factor in crash outcomes. More than 20 percent of all crashes are linked to adverse weather conditions.
Rain related fatalities
Between 2019 and 2023, 12,927 fatal crashes cited rain as a contributing factor.
The states with the highest rain related fatality rates per 100,000 people include:
| State | Fatalities | Rate per 100K |
|---|---|---|
| Mississippi | 289 | 9.83 |
| Alabama | 453 | 8.87 |
| Arkansas | 256 | 8.34 |
| South Carolina | 431 | 8.02 |
| Kentucky | 351 | 7.75 |
| Tennessee | 536 | 7.52 |
All six states have no mandatory safety inspections.
Snow related fatalities
Snow related fatality rates show a similar pattern. Wyoming, Alaska, and Montana lead the nation, and none require safety inspections.
A Policy Problem with a Simple Fix
The study concludes that inadequate windshield wipers are a preventable cause of crashes and fatalities. Wipers should be replaced every six to twelve months, yet many drivers wait years. In states without inspection requirements, defective vehicles remain on the road indefinitely.
The data suggests that mandatory inspections could reduce crash rates, especially in states with severe weather. Until such policies are adopted, drivers must take responsibility for ensuring their wipers are in full working order.
