original claimSeptember 30, 2026
Original Claim
Claim: Ceasing the biannual time change will reduce car accidents, especially those involving pedestrians.
Partly TruePoliticsUS47 days ago
“Ceasing the biannual time change will reduce car accidents, especially those involving pedestrians.”
Speaker
Donald TrumpStatement Source
SpeechStated
August 14, 2026Discovery pack us-politics · legislation
If your time is short
- Steps used: Searched peer‑reviewed studies and government reports on daylight saving time transitions and motor vehicle crash rates, focusing on pedestrian involvement; reviewed meta‑analyses and recent state‑level analyses.
- A 2020 study in Current Biology found a 6% increase in fatal traffic accidents in the week after the spring shift to DST, attributing the rise to sleep deprivation; similar patterns were noted for pedestrian‑involved crashes.
- A 2022 Insurance Institute for Highway Safety analysis of states that considered permanent DST showed no statistically significant change in total crash frequency; evening crashes decreased slightly but morning crashes increased, offsetting the benefit.
Evidence
research stepSeptember 30, 2026
Literature Review Process
Steps used: Searched peer‑reviewed studies and government reports on daylight saving time transitions and motor vehicle crash rates, focusing on pedestrian involvement; reviewed meta‑analyses and recent state‑level analyses.
evidenceSeptember 30, 2026
Spring DST Transition Increases Crash Risk
A 2020 study in Current Biology found a 6% increase in fatal traffic accidents in the week after the spring shift to DST, attributing the rise to sleep deprivation; similar patterns were noted for pedestrian‑involved crashes.
SourceevidenceSeptember 30, 2026
Mixed Effects of Permanent DST on Overall Crashes
A 2022 Insurance Institute for Highway Safety analysis of states that considered permanent DST showed no statistically significant change in total crash frequency; evening crashes decreased slightly but morning crashes increased, offsetting the benefit.
SourceevidenceSeptember 30, 2026
Pedestrian Safety and Lighting Conditions
Research published in Accident Analysis & Prevention (2021) indicated that permanent DST shifts daylight to later hours, reducing pedestrian crashes in the evening but increasing them in the morning, with net effect varying by latitude and season.
SourcecontextSeptember 30, 2026
Policy Context
The claim was made during a 2026 advocacy push for permanent daylight saving time; legislative proposals typically aim to eliminate the spring‑forward transition, which is the period most consistently linked to acute crash risk spikes.
verdictSeptember 30, 2026
Verdict Determination
Based on the evidence, the claim is partly true: ending the biannual change would likely reduce some crash risk tied to the spring transition, but the overall effect on car accidents—especially pedestrian‑involved ones—is uncertain and context‑dependent.
analysisSeptember 30, 2026
Analytical Summary
While eliminating the disruptive spring shift addresses a clear short‑term hazard, the broader safety impact of permanent DST depends on how altered light exposure affects morning versus evening travel, leading to a nuanced outcome that does not uniformly support the claim of reduced accidents.
Our Ruling
The claim that ending biannual clock changes will reduce car accidents, especially pedestrian-involved ones, is directionally supported by research showing that the spring transition to daylight saving time increases short-term crash risk due to sleep loss and circadian disruption. However, evidence on the overall impact of permanent daylight saving time is mixed: some studies find modest reductions in evening crashes, while others show no significant change or even increases in morning crashes, particularly for pedestrians, because lighting conditions shift. Thus the claim oversimplifies a nuanced relationship.
Final rating: Partly True
Sources
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