At Siegfried & Jensen, we created the Rush Hour Risk Index to measure how routine commuting contributes to fatal motor vehicle crashes across the United States. Using national traffic fatality data from 2023, we analyzed when rush-hour travel is most dangerous, which states experience the highest losses, and how risk varies (by time of day, season, weekday, and demographic group).
Rush hour is often treated as a daily inconvenience rather than a public safety concern. Our findings show that this perception understates the risk. Fatal crashes are heavily concentrated during predictable commuting windows, particularly in the evening, when traffic volume, fatigue, and reduced visibility converge.
As more Americans return to in-office work and spend more time driving during peak hours, understanding these patterns is increasingly important. Our study provides a clear takeaway: rush-hour driving (especially during the evening commute) represents one of the most consistent and underestimated roadway safety risks in the United States.
Understanding Rush Hour and Its Risks
Rush hour refers to the daily peak travel periods when congestion is highest due to work, school, and routine obligations.
In larger metropolitan areas, congestion may begin earlier or extend later depending on population density and work schedules. These periods combine high traffic volume, time pressure, and complex driving environments, all of which increase crash severity.
Morning vs. Evening Commutes
The analysis we conducted at Siegfried & Jensen of national fatal motor vehicle crash data from 2023 reveals a stark difference between morning and evening commuting risk:
- Morning rush hour: 3,448 fatal crashes; approximately 9.2% of all U.S. traffic fatalities
- Evening rush hour: 8,384 fatal crashes; approximately 22.3% of all U.S. traffic fatalities
More than one in five roadway deaths nationwide occurred during just four evening commuting hours. The evening commute alone accounted for more than double the fatalities seen during the morning commute.
This elevated risk reflects compounding factors that intensify later in the day, including:
- Heavier and sustained congestion
- Driver fatigue after a full workday
- Reduced visibility from sunset and darkness
- Increased pedestrian, cyclist, and errand-related traffic
Why the Evening Commute Is More Dangerous
The elevated risk during evening rush hour reflects the convergence of multiple factors:
- Heavier traffic volumes: Congestion is more sustained and widespread than in the morning
- Driver fatigue: Reaction time, attention, and judgment degrade after a full workday
- Reduced visibility: Sunset and darkness reduce contrast and depth perception
- Mixed road users: Pedestrians, cyclists, school pickups, errands, and recreational travel overlap with work commutes
- Greater unpredictability: Stop-and-go traffic increases the risk of rear-end and chain-reaction collisions
Unlike the morning commute, which tends to follow more routine and predictable patterns, evening rush hour reflects a wider range of travel behaviors, resulting in more complicated and hazardous driving environments.
States With the Most Rush Hour Fatalities
Rush-hour fatalities are not evenly distributed across the country. A small number of states account for a disproportionately large share of deaths during peak commuting hours.
Together, these five states account for thousands of rush-hour deaths each year.
Across all top-ranking states, these consistent trends emerge:
- The evening commute accounts for the majority of fatalities.
- Large metropolitan regions drive higher exposure.
- Longer average commute distances increase risk.
- Congestion persists across major highway corridors.
Texas recorded the highest number of rush-hour fatalities nationwide, driven largely by evening commute deaths. California and Florida followed closely, reflecting dense traffic volumes and prolonged congestion across urban and suburban road networks.
Georgia and Ohio demonstrate that elevated rush-hour risk extends beyond coastal megastates into regions with growing populations and heavily traveled commuter corridors.
Seasonal Trends in Rush Hour Fatalities
Rush-hour fatalities follow a clear seasonal pattern, with deaths concentrated during the fall and early winter months. October emerged as the single deadliest month for rush-hour travel nationwide.
This spike is driven primarily by elevated evening commute fatalities as daylight hours shorten and congestion intensifies.
Several factors combine to increase risk during these months. Earlier sunsets reduce visibility during the evening hours, making it harder for drivers to see pedestrians, cyclists, and other vehicles. At the same time, holiday travel significantly increases traffic volume, placing more vehicles on the road and raising the likelihood of collisions.
End-of-year fatigue also plays a role. As the year progresses, drivers may experience accumulated physical and mental exhaustion, which can slow reaction times and impair judgment. In addition, weather conditions become more unpredictable, with shorter days, rain, fog, or other seasonal changes further affecting road safety.
Across all five months, evening rush hour consistently accounts for the majority of fatalities. In many cases, this period represents nearly two-thirds of all monthly rush-hour deaths, highlighting the heightened danger drivers face during evening commutes.
Rush Hour Fatalities by Day of the Week
Our analysis of the National Safety Council’s 2023 national motor vehicle fatality data, limited to weekday rush-hour travel, shows an escalating pattern of risk as the workweek progresses. Rush-hour fatalities do not occur evenly from Monday through Friday. Instead, they increase steadily throughout the week, culminating in a pronounced spike on Friday.
Friday stands out as the single most dangerous day for rush-hour travel nationwide. During Friday morning and evening commute hours alone, more than 2,200 people were killed, a total that significantly exceeds any other weekday. This gap highlights how end-of-week travel conditions amplify crash risk during peak commuting periods.
Thursday and Wednesday follow at a lower but still elevated level, with approximately 1,800 rush-hour fatalities. These midweek totals reflect rising congestion and accumulating fatigue as the week wears on.
In contrast, Tuesday and Monday consistently record the lowest rush-hour fatality totals; commuter risk is comparatively reduced at the start of the workweek.
Why Friday Is Different
The sharp increase in fatalities by Friday is driven largely by changes in evening travel patterns. By the end of the week, routine commuting increasingly overlaps with discretionary trips, including social outings, errands, and early weekend departures.
These additional trips layer onto already heavy commuter traffic, creating denser roadways and more unpredictable driving environments. At the same time, driver fatigue peaks after multiple consecutive workdays, reducing reaction time, attention, and decision-making ability during the evening commute.
While Monday and Tuesday rush hours tend to reflect more structured and predictable routines, risk intensifies midweek and reaches its highest point on Friday, when congestion, fatigue, and mixed travel purposes converge. This pattern underscores Friday rush hour as a critical window for targeted traffic safety efforts, particularly during evening commute hours.
Who Is Most at Risk During Rush Hour
Our review of 2023 national motor vehicle fatality data shows that rush-hour deaths are overwhelmingly concentrated among working-age adults, underscoring that routine commuting, not late-night or recreational driving, accounts for a significant share of fatal roadway outcomes.
The most affected age groups are:
Taken together, adults aged 25–64 represent the clear majority of all rush-hour traffic fatalities nationwide, highlighting how predictable, everyday travel during peak hours poses substantial and often underestimated danger.
Older Adults
Drivers and passengers aged 65 and older account for nearly 2,700 rush-hour fatalities. While this group may drive fewer miles overall, peak commuting periods present heightened risks due to heavy congestion and reduced visibility, particularly during evening rush hour.
Age-related factors such as slower reaction times, diminished night vision, and increased physical vulnerability in high-impact crashes contribute to elevated fatality rates during these periods.
Younger Drivers
Drivers under 25 represent a comparatively smaller share of rush-hour fatalities. This pattern suggests that younger drivers’ highest-risk behaviors are more likely to occur outside traditional commuting windows, such as late at night or during non-work-related travel.
While younger drivers remain vulnerable on the road, rush-hour fatality data shows that the greatest danger during peak commute periods falls on adults engaged in routine, work-related travel rather than inexperienced or high-risk youth driving.
The Return-to-Office Effect
The decline of remote work has measurably increased driver exposure during the most dangerous periods of the day: morning and evening rush hour. As employers require more in-office attendance, traditional commuting patterns have reasserted themselves, placing more vehicles on the road during peak congestion windows.
The result has been intensified peak-hour congestion, with more drivers competing for limited roadway capacity during morning and evening rush hours. This increased exposure has direct safety implications.
Higher traffic volumes during rush hour are consistently associated with a disproportionate share of severe and fatal crashes, as dense traffic, stop-and-go conditions, and mixed travel speeds increase the likelihood of multi-vehicle collisions and high-impact crashes.
During the Peak of Remote Work
During the height of remote work adoption, national travel patterns changed significantly. Vehicle miles traveled declined, daily commuting trips decreased, and congestion eased across many major urban corridors.
With fewer drivers traveling at the same time, crash exposure during rush hour dropped, particularly on commuter-heavy routes serving central business districts and employment hubs.
The Decline of Remote Work
As remote work participation has declined, these trends have reversed. Our analysis of data reported by MIT News shows that vehicle miles traveled per capita increased by roughly 12%, signaling a broad return to daily driving.
At the metropolitan level, most large U.S. cities experienced higher overall traffic volumes, reflecting an increase in in-office attendance and longer commute distances. These changes have been especially pronounced during traditional peak commute periods, when traffic demand is most concentrated.
Taken together, the data indicate that the shift away from remote work has not only increased commuting time and congestion but has also elevated fatal crash risk during the most dangerous hours of the day. As more Americans return to routine commuting, rush-hour travel once again represents a concentrated and predictable source of roadway fatalities nationwide.
Rush Hour vs. Natural Disasters
When viewed alongside major disasters tracked by FEMA, rush-hour traffic fatalities emerge as a far larger, yet far less visible, public safety threat.
Hurricanes, floods, wildfires, and other catastrophic events command national attention, emergency declarations, and funding. However, routine commuting deaths occur quietly, without comparable recognition or response.
Annual Rush-Hour Fatalities Outpace Natural Disasters
In 2023, 11,832 people were killed during routine rush-hour commuting in the United States. This staggering number exceeds the combined annual fatalities from many major natural disasters, including hurricanes, floods, and wildfires.
Unlike disaster-related deaths, which tend to be episodic and geographically limited, rush-hour fatalities are spread across the country and occur day after day as part of ordinary work and school travel. This makes rush-hour commuting a persistent and significant public safety threat that receives far less attention than natural disasters.
Predictable Patterns of Risk
Rush-hour fatalities differ from disaster-related deaths in several key ways. They occur predictably every weekday, concentrating during the morning and evening commute windows when traffic volumes are highest. These deaths are also location-specific, frequently occurring on commuter corridors, urban arterials, and heavily traveled suburban roadways.
Most importantly, these fatalities result from routine and everyday behavior, such as driving familiar routes to work or school, rather than from extraordinary or emergency circumstances.
This predictability highlights the opportunity for targeted interventions that could reduce fatalities if time and location risks are addressed strategically.
Lack of Emergency Response
Despite the scale and predictability of rush-hour fatalities, they do not trigger emergency declarations, disaster funding, or sustained national attention. These deaths are often normalized as an unavoidable aspect of daily life, treated as a cost of mobility rather than a preventable public safety crisis.
The regularity and identifiable patterns of rush-hour traffic deaths suggest that targeted, time-specific safety measures (such as congestion management, fatigue awareness campaigns, and improved roadway design) could meaningfully reduce fatalities. Still, such interventions are not implemented with the urgency typically reserved for natural disasters.
Why Rush Hour Fatalities Are Predictable
Our in-depth analysis of 2023 national motor vehicle fatality data demonstrates that rush-hour deaths are not random occurrences.
Instead, they follow clear and consistent patterns, clustering across specific times, locations, and demographic groups. This predictability is critical for understanding risk and implementing targeted safety measures.
Key patterns in rush-hour fatalities include:
- Evening commute hours: The majority of rush-hour fatalities occur during the evening commute, typically between 4:00 p.m. and 7:59 p.m. During these hours, heavier traffic, declining visibility, and end-of-day fatigue combine to create a uniquely hazardous driving environment.
- High–impact states: Fatalities are concentrated in a relatively small group of states with dense traffic corridors and high commuter volumes. In 2023, Texas, California, Florida, Georgia, and Ohio accounted for the highest number of rush-hour deaths, highlighting geographic concentrations of risk.
- Late–year months: Seasonal trends further intensify risk. Rush-hour fatalities peak during October, November, and December, when shorter daylight hours, worsening weather conditions, and cumulative driver fatigue intersect. These months consistently show the highest fatality totals, particularly during evening commutes.
- Fridays: Weekday analysis shows that fatalities build steadily throughout the workweek, peaking on Fridays. This end-of-week spike is driven by overlapping factors such as heavier traffic, early weekend departures, social travel, and driver fatigue after multiple consecutive workdays.
- Working–age adults: Demographically, adults aged 25–64 represent the majority of rush-hour fatalities, reflecting the risk posed by routine commuting rather than late-night or recreational driving. Older adults aged 65 and above also face an elevated risk during peak travel hours due to slower reaction times and increased physical vulnerability.
Implications for Targeted Safety Interventions
The predictability of rush-hour fatalities provides an opportunity to implement time-specific and location-specific safety measures that can prevent deaths.
Key intervention areas include:
- Evening congestion management: Reducing traffic bottlenecks, optimizing signal timing, and improving roadway design in high-traffic corridors can lower crash risk during peak hours.
- Fatigue awareness campaigns: Educating drivers about the dangers of end-of-day fatigue and promoting strategies such as rest breaks, flexible work hours, and staggered commuting can mitigate the elevated risk of evening crashes.
- Improved roadway lighting and visibility: Enhancing street lighting, reflective signage, and roadway markings can help drivers navigate more safely during low-light conditions, particularly in late fall and early winter months.
- Time–specific enforcement strategies: Concentrating traffic law enforcement during the most dangerous hours and days (especially Friday evenings and high-risk months) can deter unsafe behaviors, such as speeding or distracted driving, and reduce fatal crash outcomes.
By recognizing that rush-hour fatalities follow consistent, identifiable patterns, policymakers, transportation planners, and public safety organizations can move beyond reactive measures and implement strategic interventions that address the predictable risks of daily commuting.
Implications of the Rush Hour Risk Index Findings
According to our analysis by our Utah car accident lawyers, routine commuting is a persistent and highly predictable public safety risk in the United States. The majority of fatalities occur during evening commute hours, are concentrated in a small group of high-impact states, spike during late-year months, and peak on Fridays.
These patterns demonstrate that rush-hour fatalities are not random accidents but the result of predictable traffic volumes, environmental conditions, and commuter behaviors. Recognizing this predictability presents opportunities for targeted safety interventions.
The research we conducted at Siegfried & Jensen highlights the broader importance of understanding commuting risk as a major, yet often overlooked, public safety challenge.
With the return to in-office work and increasing traffic exposure, these findings carry immediate relevance for policymakers, transportation planners, and public safety organizations.