How to Keep Your Teen Driver Safe During Summer’s 100 Deadliest Days

The stretch of summer between Memorial Day and Labor Day is the most dangerous time of year for teenage drivers, and safety researchers have a blunt name for it: the 100 Deadliest Days. With school out, more young drivers on the road, and more of them behind the wheel without an adult, fatal crashes involving teens spike. The good news for parents is that the biggest risk factors are well understood, and most are within a family’s control. Here is what the data shows and the specific steps that lower the odds for your teen this summer.

This is not about scaring new drivers off the road. It is about understanding where the danger concentrates and setting a few clear rules that research links to fewer crashes. A short conversation and a written agreement now can do more than almost anything else to keep a young driver safe through August.

Why Summer Is So Dangerous for Teen Drivers

According to AAA, in 2024, the most recent year of complete crash data, 2,636 people were killed in crashes involving a teen driver, and about a third of those deaths, 825 people, happened during the 100 days between Memorial Day and Labor Day. Across the decade from 2015 through 2024, 7,805 people died in summertime crashes that involved a teen driver. On an average summer day, about eight people are killed in teen-involved crashes, compared with seven the rest of the year.

One figure reframes how families should think about the risk. Nearly two-thirds of the people injured or killed in a crash involving a teen driver are not the teen behind the wheel. They are passengers, people in other vehicles, pedestrians and cyclists. Teen driving safety is not only about protecting your own child. It is about everyone who shares the road with them.

Summer raises the danger because the conditions that lead to teen crashes all increase at once. Teens drive more during vacation, more often for fun rather than a set commute, more frequently at night, and more often with other teenagers in the car. The risk of a fatal crash rises with each additional young passenger, because friends in the vehicle are a powerful source of distraction and social pressure.

The Three Mistakes Behind Most Teen Crashes

Research into serious teen crashes keeps pointing to the same three critical errors. The first is a failure to scan the road and detect hazards in time, a skill that comes only with experience. The second is driving too fast for the conditions, which is not always the same as breaking the speed limit; rain, a tight curve or heavy traffic can make a legal speed unsafe. The third is distraction, whether from a phone, the radio, food or passengers.

Distraction deserves special attention. It is involved in roughly 60 percent of teen crashes, and the worst form is the smartphone. A glance at a text at highway speed can take a driver’s eyes off the road for the length of a football field. New drivers have not yet built the instinct to recover from a missed hazard, so a few seconds of inattention carries far more danger for a teen than for a veteran driver. Tackling distraction is the single highest-value change a family can make.

How Graduated Licensing Helps and Where the Gaps Are

Every state uses a graduated driver licensing system that phases in driving privileges over three stages: a supervised learner stage, an intermediate stage that limits the riskiest driving, and a full license. These laws work. Studies credit graduated licensing with sharp reductions in teen crashes since the systems spread nationwide. The protection comes from limiting exactly the situations that prove most dangerous for new drivers.

During the intermediate stage, every state except Vermont restricts night driving, and 47 states plus the District of Columbia limit the number of passengers a young driver may carry. The specifics vary widely. Illinois, for example, bars intermediate-license holders from driving between 10 p.m. and 6 a.m. on weeknights and 11 p.m. and 6 a.m. on weekends, while other states draw the line at midnight. The gap is that these are minimum legal limits, and many of the most dangerous trips, late at night with a car full of friends, are technically still possible right up to the legal boundary. Families who set rules stricter than the law fill that gap.

It is worth knowing your own state rules precisely, because penalties for breaking graduated licensing conditions can include extending the restricted period or delaying a full license. Your state motor vehicle agency publishes the exact night curfew and passenger limits that apply to your teen.

What Parents Can Do Right Now

Start with a parent-teen driving agreement that puts the rules in writing. AAA and other safety groups offer free templates, and the act of signing one turns vague expectations into clear commitments. The most effective rules target the proven risks: limit teen passengers, ideally to none for the first several months of solo driving, and cap or ban night driving beyond what the law already requires.

Make the phone a non-issue by having your teen switch it to a do-not-disturb-while-driving mode or place it out of reach before starting the engine. Insist on seatbelts for every person on every trip, since many teens killed in crashes were unbelted. Keep practicing together even after the test is passed, deliberately seeking out rain, dusk and busy roads so your teen builds the hazard-scanning skill that experience normally provides. Talk about speed in terms of conditions, not just the posted limit.

Finally, model the behavior you ask for. Teens learn driving habits from years of watching the adults around them, so a parent who texts at the wheel or speeds undercuts every rule on the agreement. AAA frames the summer campaign as 100 Days of Safe Driving for exactly this reason: the habits that protect a teen also make the whole family safer. For more on the broader risks new drivers face, see our coverage of rising US car insurance costs, which hit young drivers hardest.

The 100 Deadliest Days are a real and measurable danger, but they are not beyond a family’s influence. Fewer passengers, less night driving, no phone, belts on, and steady practice add up to meaningfully better odds. Set the rules before the next road trip, not after a close call.

Sources:

• https://newsroom.aaa.com/2025/05/the-100-deadliest-days-teen-driver-deaths-jump-in-summer-months/
• https://ktvz.com/news/2026/06/03/why-the-next-100-days-are-the-most-dangerous-time-of-year-for-teen-drivers/
• https://aaafoundation.org/teen-driver-risk-relation-age-number-passengers/
• https://www.iihs.org/topics/teenagers/graduated-licensing-laws-table