A single major event can push an already congested city transportation network toward its breaking point.
Tens of thousands of drivers converge on the same neighborhoods, rideshare vehicles flood surrounding streets, parking capacity disappears and ordinary commuter routes are forced to absorb traffic volumes far beyond a typical day.
Research by Attorney Brian White examined how major U.S. metropolitan areas withstand these sudden transportation surges, comparing congestion, road safety, idle time and the ability of local networks to recover after traffic spikes.
The analysis was originally conducted around cities hosting the 2026 FIFA World Cup, but the tournament provided something broader: a real-world stress test for transportation systems that regularly host NFL games, concerts, conventions, festivals and other large gatherings.
The findings show a substantial divide between cities.
Foxborough/Boston recorded the strongest transportation score at 8.01 out of 10, followed by Houston at 7.66. Los Angeles scored just 4.76, making it the weakest-performing U.S. location among those ranked.
The consequences of that difference are not limited to event attendees. Major-event traffic can increase trip volumes by more than 50%, cut average roadway speeds by more than half and delay emergency travel to hospitals.
Boston and Houston Were Best Equipped to Handle Major Traffic Surges
Cities were evaluated using a composite transportation score between zero and 10.
The score incorporated four factors: congestion, idle time, road safety and network resilience.
Conditions immediately surrounding major venues accounted for 60% of the ranking, while transportation conditions across the wider metropolitan area represented the remaining 40%.
Higher scores indicated cities better equipped to absorb a sudden influx of traffic.
Highest-Ranked Transportation Networks
| Venue and Metro Area | Score |
|---|---|
| Gillette Stadium, Foxborough/Boston | 8.01 |
| NRG Stadium, Houston | 7.66 |
| Estadio Azteca, Mexico City | 7.29 |
Foxborough/Boston was the only location to earn a score above 8.
Its performance reflected resilient suburban road networks and comparatively low periods of vehicle idling.
Houston ranked second despite the broader metropolitan area’s reputation for congestion. The city’s ability to handle major-event traffic around NRG Stadium helped it outperform locations with less severe everyday traffic.
That distinction is important.
A city can experience significant daily congestion and still perform relatively well when unusually large crowds arrive if its transportation network has enough resilience, transit capacity and event-specific traffic management.
Los Angeles Had the Lowest Score Among U.S. Locations
At the opposite end of the rankings, Los Angeles emerged as the most vulnerable U.S. location examined.
SoFi Stadium received an overall transportation score of 4.76.
Only Toronto and Vancouver recorded lower scores across the broader North American ranking.
Lower-Ranked Major Event Transportation Networks
| Venue and Metro Area | Score |
|---|---|
| BMO Field, Toronto | 3.99 |
| BC Place, Vancouver | 4.46 |
| SoFi Stadium, Los Angeles | 4.76 |
| Lumen Field, Seattle | 5.39 |
| Mercedes-Benz Stadium, Atlanta | 5.44 |
| Lincoln Financial Field, Philadelphia | 5.69 |
| MetLife Stadium, New York/New Jersey | 5.80 |
| Hard Rock Stadium, Miami | 6.78 |
Congestion around SoFi Stadium reached 59.8%, creating substantial potential for long delays following large events.
Seattle and Atlanta also ranked toward the bottom of the U.S. locations, with scores of 5.39 and 5.44, respectively.
The rankings demonstrate that major-event transportation problems are not exclusively associated with the country’s largest metropolitan areas.
What matters is how much available road capacity exists, whether alternative transportation is available and how effectively a city’s network can recover once demand spikes.
Traffic Can Start Building Six Hours Before an Event
Major-event congestion begins much earlier than the moment spectators arrive at the gates.
Around MetLife Stadium, traffic can begin building four to six hours before a major event.
Comparable events have increased nearby trip volumes by more than 50%.
At the same time, average speeds on important approach roads dropped from 44 mph to just 20 mph.
That represents a reduction of more than half.
The transportation impact can therefore stretch across most of a day, affecting people who are not attending the event at all.
Commuters can encounter unexpected detours. Delivery drivers lose time. Businesses experience delays. Residents may struggle to leave their own neighborhoods.
Emergency services can also be affected.
Heavy event congestion and overloaded parking areas can increase hospital travel times by approximately 3 minutes and 31 seconds.
Nearly 8 in 10 Drivers Say Event Traffic Is More Stressful
Drivers themselves recognize the difference between ordinary traffic and the conditions surrounding major events.
Seventy-nine percent of U.S. drivers said navigating traffic during a major sporting event is more stressful than driving on a normal day.
Another 76% considered major events a road safety risk.
Fuel use creates an additional frustration. More than three-quarters of American drivers were concerned about wasting fuel while sitting in idling event traffic.
Work-related trips were delayed by an average of 27 minutes in the United States.
Comparable delays reached 29 minutes in Canada and 41 minutes in Mexico.
The numbers demonstrate why severe congestion becomes more than an inconvenience. The effects spread across productivity, fuel costs, emergency response and road safety.
Congestion Can Combine With Dangerous Driving Behaviors
Different states also showed different patterns of risky driving.
Massachusetts had the highest distracted-driving rate among the areas studied, running 18% above the host-state average.
Texas stood out for speed.
High-speed driving occurred nearly 60% more frequently in Texas than in the other states examined.
California showed another risk: sudden braking incidents were 25% more common than in other host states.
Missouri performed better across the major behavioral indicators.
| State | Notable Driving Pattern |
|---|---|
| Massachusetts | Distracted driving 18% above average |
| Texas | High-speed driving nearly 60% higher |
| California | Sudden braking 25% more frequent |
| Missouri | Lower risk across key indicators |
These behaviors become particularly important when traffic conditions are unstable.
Sudden congestion can cause drivers to brake sharply. Temporary lane openings can encourage speeding. Detours and unfamiliar routes may increase dependence on navigation apps.
The result is an environment where congestion and risky driver behavior can reinforce one another.
Los Angeles Shows How Expensive Gridlock Can Become
Traffic delays are only one cost associated with major-event travel.
Parking around SoFi Stadium demonstrates how quickly transportation costs can increase when demand exceeds available space.
Official park-and-ride options could begin at $55 and exceed $100.
Resale parking for especially high-demand events reached between $256 and $454.
For drivers, those expenses come before fuel or the indirect financial cost of time lost sitting in traffic.
The combination can make driving both slower and substantially more expensive than using public transportation.
However, transit availability varies considerably between cities.
Strong Transit Networks Can Keep Thousands of Cars Off the Road
Cities with high-capacity public transportation have a significant tool for reducing major-event gridlock.
Philadelphia’s Broad Street Line can transport approximately 15,000 passengers per hour during periods of high demand.
Houston used expanded METRORail and bus services around NRG Stadium.
The Red Line serving the Stadium Park/Astrodome Station operated approximately every six to 12 minutes, providing an alternative to private vehicles.
Boston expanded bus, subway and stadium train services, while Dallas-Fort Worth increased light-rail and commuter-rail capacity.
These systems allow cities to move thousands of spectators without generating thousands of additional individual vehicle trips.
The scale of the investment required to accomplish that is significant.
U.S. host cities received $846 million in major-event grant funding, while another $100.3 million was invested in public transportation improvements.
Although those investments were made around the 2026 tournament, transportation improvements can continue benefiting commuters and future events long after the competition ends.
Rideshare Services Can Create a Second Wave of Congestion
Rideshare services can reduce the need for parking, but they do not eliminate traffic.
When as many as 70,000 people exit a major venue at nearly the same time, thousands may begin requesting rides within minutes of one another.
That can create overloaded pickup zones, long waits and unusually high fares.
Surge pricing at comparable events reached as much as 400% within two miles of a stadium.
Within five miles, prices could increase between 200% and 250%.
A trip that ordinarily costs $35 can rise to between $120 and $150.
Three especially intense demand periods were identified around major stadium events:
- Approximately 75 minutes before the event
- Around halftime
- During the first 40 minutes after the event ends
Distance from the stadium can significantly change the cost.
At MetLife Stadium, walking farther from the venue reduced a rideshare surge multiplier from 3.2 times the normal fare to 1.6 times, saving approximately $70.
Major Events Act as Stress Tests for City Transportation
The findings examined by Attorney Brian White extend well beyond one international sporting tournament.
NFL games, concerts, festivals, conventions and other major gatherings routinely create the same fundamental transportation problem: large numbers of people entering and leaving a limited geographic area within a short period of time.
The data shows just how quickly conditions can deteriorate.
Trip volumes can increase more than 50%. Average speeds can fall from 44 mph to 20 mph. Rideshare fares can climb 400%. Traffic can begin building six hours before an event.
Yet the difference between Boston, Houston and lower-ranked cities such as Los Angeles suggests those outcomes are not determined by crowd size alone.
Transportation resilience matters.
So does public transit capacity, venue accessibility, traffic management and the ability of a road network to recover once demand begins falling.
For major American cities, gridlock is increasingly becoming a measure of how well urban infrastructure performs under pressure.
A city may function adequately on an ordinary weekday. The more revealing test is what happens when tens of thousands of additional people arrive at the same place at once.