Most drivers know to give a tractor-trailer a little extra room on the highway. What may be less obvious is just how differently a large commercial truck moves, stops, turns, and responds to traffic compared with a passenger vehicle.
Those differences are significant enough that transportation officials have made educating motorists about them a highway safety priority. The Federal Motor Carrier Safety Administration (FMCSA) has a national campaign devoted to helping drivers safely share the road with large trucks and buses. More recently, the Georgia Department of Driver Services urged motorists to prioritize sharing the road safely with commercial vehicles, emphasizing blind spots, limited maneuverability, and longer stopping distances.
The goal isn't to make drivers afraid of the tractor-trailers they encounter every day. It's to understand why driving around a large commercial vehicle sometimes requires different decisions than driving alongside another car. Those precautions are only one part of roadway safety. Commercial truck drivers and the companies that put those vehicles on the road also have responsibilities to operate safely and comply with state and federal safety requirements.
Commercial Trucks Don't Move Like Passenger Vehicles
A fully loaded tractor-trailer can weigh as much as 80,000 pounds, compared with roughly 4,000 pounds for a typical passenger vehicle. That size and weight affect nearly everything the truck does on the road.
Large trucks take longer to accelerate. They need considerably more room to stop. Their length affects how they make turns, and their height and configuration create substantial areas around the vehicle that the driver may not be able to see.
The FMCSA describes these as operating limitations rather than simply shortcomings. A truck driver can't make an 80,000-pound tractor-trailer respond like a sedan. That's why motorists should understand these differences, and why commercial drivers must account for them when choosing their speed, following distance, and other driving behaviors.
Why Truck Blind Spots Can Be So Dangerous
Every vehicle has blind spots, but those surrounding a tractor-trailer are much larger. A commercial truck driver may have difficulty seeing vehicles directly in front of the cab, directly behind the trailer, and along both sides of the truck. The area on the right side can be particularly difficult to see.
A useful rule from the FMCSA is simple: If you can't see the truck driver in the truck's side mirror, the driver probably can't see you. That doesn't mean a motorist needs to speed past every tractor-trailer. It does mean drivers should avoid lingering alongside a truck when traffic conditions allow them to move ahead or fall back safely.
Passing on the left also improves visibility. The Georgia Department of Driver Services recommends passing commercial vehicles on the left and avoiding remaining beside them for extended periods.
Commercial Trucks Need More Room to Stop
Stopping distance is another difference that can be easy to underestimate from behind the wheel of a car. A driver may pass a tractor-trailer and see what appears to be plenty of open pavement before moving back into the truck's lane. But suddenly occupying that space can eliminate the stopping cushion the truck driver was maintaining.
The same issue can arise when traffic slows unexpectedly. A passenger vehicle can often respond more quickly than a fully loaded truck traveling at the same speed.
Leaving additional room isn't simply a courtesy. It gives the truck driver more time and distance to react if traffic conditions change. Truck drivers, in turn, must maintain a safe following distance and adjust their speed for traffic, weather, road conditions, and the limitations of the vehicle they're operating.
Turning and Merging Can Create Additional Risks
Anyone who has watched a tractor-trailer negotiate a tight intersection has probably seen the truck move differently than expected. A driver may swing wide or appear to begin a turn from a position that leaves open space beside the truck. That space isn't an invitation to pull alongside.
Large trucks need additional room to complete turns without the trailer striking a curb, vehicle, sign, or other object. Trying to squeeze between a turning truck and the curb can put a smaller vehicle directly in the truck driver's blind spot and in the path of the trailer.
Similar patience can help around entrance ramps and lane changes. Trucks accelerate more slowly and require more space to merge. Allowing a truck enough room to enter the lane can prevent both drivers from having to make sudden maneuvers.
How Drivers Can Reduce Risks Around Commercial Trucks
Many of the safest choices around commercial vehicles are relatively simple. Don't tailgate; avoid cutting in too close in front of a truck; stay out of blind spots when possible; signal before changing lanes; and give a turning truck room to maneuver.
Those choices may be especially important for newer drivers. A National Distracted Driving Coalition fact sheet emphasizes the importance of teaching young drivers to interact safely with commercial vehicles. Programs around the country have given drivers opportunities to learn firsthand about truck blind spots, stopping distances, and other operating differences.
Distraction and aggressive driving can make those challenges worse for drivers of any age. Looking at a phone for several seconds can be dangerous anywhere, but doing so while traveling alongside a tractor-trailer can leave little time to respond to a lane change, a traffic slowdown, or other unexpected movement.
Safe Driving Around Trucks Is a Shared Responsibility
Passenger-vehicle drivers can reduce their risk by understanding how commercial trucks operate, but that doesn't mean motorists are responsible for avoiding every truck crash.
Commercial drivers have their own safety obligations. Because they operate vehicles capable of causing catastrophic harm in a collision, professional truck drivers must account for their vehicle's size, blind spots, stopping distance, cargo, traffic conditions, and other hazards. Trucking companies also have responsibilities involving driver qualifications, vehicle maintenance, hours of service, and other areas governed by federal and state safety requirements. When those responsibilities aren't met, truck accidents can raise complicated questions about negligence and liability.
"Understanding how a large truck operates can help motorists make safer decisions around them, but safety is a shared responsibility," said Brandon Smith, an attorney with Childers, Schlueter & Smith, who handles trucking accident lawsuits nationwide. "Truck drivers and trucking companies have an obligation to operate these vehicles safely, maintain their equipment, and follow the rules designed to protect everyone on the road."
When something goes wrong, determining why can require looking well beyond the few seconds immediately before impact. A driver may have been fatigued or distracted. Brakes or tires may not have been properly maintained. Cargo may have shifted or been improperly secured. A carrier may have a history of safety violations. In other situations, investigators may use dashcam footage and electronic truck data to determine what each vehicle was doing before the collision.
These are some of the reasons a serious truck accident investigation can be considerably more complicated than determining which driver had the right of way.
What Happens After a Serious Commercial Truck Crash?
Even the most cautious driver can't control every vehicle around them.
When a commercial truck crash causes serious injuries or death, investigators may examine the truck driver's actions, the vehicle's condition, electronic records, cargo, the carrier's safety history, and the conduct of other motorists. Depending on what they find, more than one company or individual may ultimately bear responsibility.
For people injured in these crashes, understanding how truck accident investigations differ from other motor vehicle crashes can be important. Legal Examiner's Trucking Accidents Guide explains how federal regulations, carrier safety records, electronic evidence, and liability issues can affect the aftermath of a commercial truck collision.
Most trips alongside tractor-trailers end without incident. Understanding what truck drivers can and can't see, allowing additional space, and avoiding unnecessary risks around large commercial vehicles can help motorists protect themselves. However, safe roads also depend on professional drivers and trucking companies recognizing the enormous responsibility that comes with putting an 80,000-pound vehicle on the highway. Sharing the road works best when everyone understands both the risks and their responsibilities.
