How Deadly Is Driving at Night in the US? 2024 Data

Quick answer: More than half of America's road deaths happen after dark. In 2024, 20,971 people died in nighttime crashes — between 6pm and 6am — which is 53% of all 39,254 US road deaths, according to NHTSA's Traffic Safety Facts Overview 2024. Night deaths fell 5.6% from 22,219 in 2023, a bigger improvement than daytime's 2.7% fall to 18,017. But the night still takes the larger share of lives.

Night versus day, in numbers

NHTSA splits the day at 6am and 6pm, and the 2024 figures show how unevenly deaths are spread across those two halves:

• Nighttime (6pm to 5:59am): 20,971 deaths in 2024, down 5.6% from 22,219 in 2023 — a fall of 1,248 lives.
• Daytime (6am to 5:59pm): 18,017 deaths in 2024, down 2.7% from 18,525 in 2023 — a fall of 508 lives.
• Nighttime deaths made up 53.4% of all 39,254 road deaths in 2024; a small number of deaths had an unknown time and sit outside both totals.

Two things are true at once. The roads got safer at night faster than during the day — the 5.6% fall in night deaths was more than double the daytime improvement. Yet the night still accounts for the majority of deaths, even though far fewer miles are driven after dark. These are counts, not rates: they do not adjust for traffic volume, so the risk per mile driven at night is higher than the raw 53% share suggests.

Weekends: the danger window

NHTSA also cuts the week in two, and the weekend window tells a similar story:

• Weekend (Friday 6pm to Monday 5:59am): 16,128 deaths in 2024, down 6.9% from 17,321 in 2023 — the sharpest improvement of any time category.
• Weekday (Monday 6am to Friday 5:59pm): 23,059 deaths in 2024, down 2.4% from 23,630 in 2023.
• The weekend window covers about 36% of the hours in a week but accounted for 41% of all deaths.

Friday and Saturday nights combine the two danger factors — darkness and weekend travel — which is why they dominate the national picture year after year. For how the patterns break down state by state, see US car accident deaths by state.

Why the night is riskier

Darkness does most of the damage through reduced visibility: drivers see less far ahead, judge distances and speeds less well, and have less time to react to anything unexpected. The danger is worst for people outside vehicles. NHTSA's Halloween analysis found that 7 of 8 children killed as pedestrians on five recent Halloweens died after 6pm — darkness concentrates the risk where protection is thinnest. Read the full figures in Is Halloween the Deadliest Night for Pedestrians?

The night hours also overlap with the two other risks that rise after dark. NHTSA's drowsy-driving research shows fatigue crashes peak between midnight and 6am, when the body's circadian rhythm dips. And alcohol-impaired driving, which caused 30% of all 2024 road deaths, is concentrated in the evening and night hours.

Autumn is night-driving season

The calendar makes the next few weeks the most dangerous stretch of the year for driving after dark. US clocks go back on Sunday 1 November 2026, which moves the evening commute into darkness overnight for the whole country. The three deadliest months of the year for pedestrians — October, November and December — are the three darkest, with evening deaths rising as daylight shrinks.

Halloween, on Saturday 31 October 2026, sits right at the start of that stretch: an evening when large numbers of children walk residential streets in the dark while weekend traffic is still heavy. Drivers can cut the risk with simple habits — slowing down in residential areas after dark, keeping headlights clean and properly aimed, and never out-driving their headlights on unlit roads.

How these numbers were counted

All figures are from NHTSA's Traffic Safety Facts Research Note: Overview of Motor Vehicle Traffic Crashes in 2024 (Report No. DOT HS 813 791, April 2026), based on the Fatality Analysis Reporting System — the census of every fatal motor-vehicle crash on US public roads in which someone died within 30 days. NHTSA defines nighttime as 6pm to 5:59am and daytime as 6am to 5:59pm; the weekend runs from Friday 6pm to Monday 5:59am. The 2024 figures come from the Annual Report File, which NHTSA may revise when it issues the final file; 2023 figures are final. A small number of deaths had an unknown time and are counted in the total but in neither time band. More data: today's live accident reports and the article archive.