Common Car Accidents on Roundabouts

Roundabouts have become increasingly common throughout Illinois and across the United States because they are designed to reduce severe crashes, improve traffic flow, and lower vehicle speeds. Although roundabouts are generally safer than traditional intersections, accidents still happen every day due to driver confusion, speeding, distraction, failure to yield, and improper lane use.

At John J. Malm & Associates, we have seen how even low-speed crashes in roundabouts can cause serious injuries, especially when larger vehicles, motorcycles, bicyclists, or pedestrians are involved. Understanding the most common types of roundabout accidents can help drivers stay safer and recognize when another driver’s negligence may create legal liability after a crash.

“Roundabout crashes are often dismissed as minor fender-benders, but many victims suffer serious neck, back, and head injuries that can affect them for years. Insurance companies frequently underestimate these cases, which is why it is important to have an experienced attorney investigate the accident and protect your rights.” – John J. Malm, Naperville car accident attorney

Why Roundabouts Are Considered Safer

Modern roundabouts are designed to slow traffic and eliminate dangerous right-angle or “T-bone” collisions that commonly occur at signalized intersections. Vehicles entering a roundabout must yield to traffic already circulating in the circle, which reduces high-speed impacts.

According to the Insurance Institute for Highway Safety (IIHS), studies of U.S. intersections converted to roundabouts found:

Injury crashes decreased by approximately 72% to 80%
Overall crashes dropped by 35% to 47%
Fatal and incapacitating crashes were dramatically reduced

The Federal Highway Administration (FHWA) also identifies roundabouts as a “Proven Safety Countermeasure” because they reduce severe crashes and improve intersection safety. However, roundabouts are not accident-proof. Many drivers are unfamiliar with how they work, especially multilane roundabouts, which can create confusion and dangerous driving behavior.

The Most Common Types of Roundabout Accidents

Although roundabouts reduce severe collisions, several types of crashes still occur frequently.

Failure-to-Yield Accidents

One of the most common roundabout crashes occurs when a driver entering the roundabout fails to yield to vehicles already circulating inside the circle. Many drivers mistakenly assume they have the right-of-way or enter too quickly to stop safely. These crashes often happen because drivers:

Misjudge traffic gaps
Enter aggressively
Are distracted by GPS or cell phones
Do not understand yield rules

Failure-to-yield accidents can lead to side-impact collisions and significant property damage. Motorcyclists and smaller vehicles are particularly vulnerable in these crashes. According to IIHS research, entering-circulating crashes are among the most common crash patterns at roundabouts.

Rear-End Collisions

Rear-end crashes are another common type of roundabout accident. These crashes often occur because drivers suddenly stop when approaching or entering the roundabout. Some drivers panic when they see oncoming traffic in the circle and brake unexpectedly. Other drivers follow too closely and do not have enough time to react.

Common causes of rear-end collisions at roundabouts include:

Distracted driving
Tailgating
Sudden braking
Driver confusion
Poor visibility during bad weather

While many rear-end crashes occur at lower speeds, victims can still suffer serious injuries such as:

Whiplash
Herniated discs
Concussions
Shoulder injuries
Neck and back trauma

Sideswipe Accidents in Multilane Roundabouts

Multilane roundabouts can be confusing because drivers must choose the correct lane before entering and maintain their lane while circulating through the roundabout. Sideswipe crashes frequently occur when drivers:

Change lanes improperly
Drift into adjacent lanes
Exit from the wrong lane
Fail to check blind spots

These crashes are especially common in larger roundabouts where traffic volumes are heavier. IIHS research found that exiting-circulating and sideswipe crashes are among the most common collision types in multilane roundabouts.

Single-Vehicle Roundabout Crashes

Some roundabout accidents involve only one vehicle. These crashes often happen when drivers enter the roundabout too fast and lose control.

Single-vehicle crashes may involve:

Hitting the central island
Running off the roadway
Striking curbs or barriers
Colliding with signs or landscaping

These accidents frequently occur at night or during rain, snow, or icy conditions. According to research analyzing Maryland roundabout crashes, collisions with the central island accounted for nearly half of all single-vehicle run-off-road crashes.

Truck and Commercial Vehicle Accidents

Large trucks face unique challenges in roundabouts due to their size and turning radius. Commercial trucks often need to straddle lanes while navigating smaller roundabouts, increasing the risk of collisions with nearby vehicles.

Truck-related roundabout accidents may involve:

Wide-turn crashes
Blind spot collisions
Trailer swing accidents
Rollovers
Sideswipe impacts

Passenger vehicles that attempt to squeeze beside a truck in a roundabout may be struck unexpectedly as the truck turns. Because commercial vehicles are significantly heavier than passenger cars, these crashes can cause catastrophic injuries.

Motorcycle Accidents on Roundabouts

Motorcyclists face elevated risks at roundabouts because motorcycles are less visible to other drivers. Motorcycle crashes often happen when:

Drivers fail to see the motorcycle
Vehicles cut off motorcyclists
Road surfaces are slippery
Drivers suddenly change lanes

Roundabout crashes can be especially dangerous for riders because even low-speed impacts may throw a motorcyclist from the bike. Research reviewing fatal roundabout crashes found motorcycle accidents were disproportionately represented in serious roundabout collisions.

Pedestrian and Bicycle Accidents

Roundabouts are generally safer for pedestrians than traditional intersections because traffic speeds are lower and pedestrians cross one direction of traffic at a time. However, pedestrian and bicycle crashes still occur.

Pedestrian accidents commonly happen when drivers:

Fail to yield at crosswalks
Focus only on vehicle traffic
Become distracted
Exit the roundabout too quickly

Cyclists are also vulnerable when vehicles fail to share the roadway or drivers misjudge a cyclist’s speed and position. Studies cited by IIHS indicate pedestrian crashes may decrease by approximately 75% after conversion to roundabouts, but multilane roundabouts still create risks for vulnerable road users.

Common Causes of Roundabout Accidents

Several factors contribute to crashes at roundabouts.

Distracted Driving

Drivers looking at phones, GPS systems, or passengers may fail to notice traffic already circulating in the roundabout.

Speeding

Entering a roundabout too fast reduces reaction time and increases the likelihood of losing control.

Driver Confusion

Many drivers still do not fully understand how roundabouts work, especially multilane configurations.

Impaired Driving

Alcohol and drug impairment significantly increase the risk of roundabout crashes because drivers may have delayed reaction times and impaired judgment.

Poor Weather Conditions

Rain, snow, ice, and fog can reduce visibility and make it harder to stop safely when approaching a roundabout.

Injuries Commonly Sustained in Roundabout Crashes

Even though roundabout crashes often occur at lower speeds, serious injuries can still result.

Common injuries include:

Whiplash
Traumatic brain injuries
Concussions
Broken bones
Spinal cord injuries
Herniated discs
Shoulder injuries
Facial fractures
Internal injuries

Victims may require emergency treatment, surgery, rehabilitation, physical therapy, and long-term medical care.

Determining Liability After a Roundabout Accident

Liability in a roundabout accident depends on the specific facts of the crash.

Potentially liable parties may include:

Drivers who failed to yield
Distracted drivers
Speeding motorists
Truck drivers or trucking companies
Government entities responsible for roadway design or maintenance

Evidence commonly used in roundabout accident claims includes:

Police reports
Witness statements
Traffic camera footage
Vehicle damage analysis
Black box data
Photographs of the scene
Expert accident reconstruction

Because roundabout accidents can involve multiple vehicles and conflicting accounts, a thorough investigation is often necessary.

What to Do After a Roundabout Accident

If you are injured in a roundabout crash, taking the right steps can help protect both your health and your legal claim.

After an accident:

Call 911 immediately
Seek medical attention
Take photographs of the scene
Exchange information with other drivers
Obtain witness contact information
Avoid admitting fault
Notify your insurance company
Contact an experienced Illinois car accident attorney

Insurance companies often attempt to minimize injuries in lower-speed crashes, even when victims suffer significant pain and long-term medical complications.

Frequently Asked Questions about Roundabout Accidents

Q: Are roundabouts safer than traditional intersections?

A: Yes. Studies consistently show roundabouts reduce fatal and serious injury crashes because they slow vehicle speeds and eliminate many high-speed impact points.

Q: Who has the right-of-way in a roundabout?

A: Drivers already circulating inside the roundabout generally have the right-of-way. Vehicles entering the roundabout must yield.

Q: What is the most common type of roundabout accident?

A: Failure-to-yield crashes, rear-end collisions, and sideswipe accidents are among the most common roundabout crashes.

Q: Are multilane roundabouts more dangerous?

A: Multilane roundabouts can be more complicated for drivers and may have higher rates of sideswipe and lane-change accidents compared to single-lane roundabouts.

Q: Should I hire a lawyer after a roundabout accident?

A: If you suffered injuries, it is wise to speak with an experienced personal injury attorney as soon as possible.

Contact the Dedicated Illinois Trial Car Accident Lawyers at John J. Malm & Associates

Roundabout crashes can lead to serious injuries, expensive medical bills, lost income, and lasting physical pain. Even though these collisions often occur at lower speeds, insurance companies frequently attempt to downplay the severity of the injuries involved. At John J. Malm & Associates, we understand how roundabout accidents happen and how to build strong claims for injured victims throughout Illinois.

If you or a loved one has been injured in a roundabout accident, our experienced legal team is prepared to investigate your case, gather evidence, negotiate with the insurance company, and fight for the compensation you deserve. Contact our firm today for a free consultation and learn how we can help protect your rights and pursue maximum compensation for your injuries.