Passing Lane: Also called the left lane, overtaking lane, and informally the “fast lane” and “go lane,” the passing lane is exactly what it says it is—designated for passing.
It is not a driver’s personal scenic byway; it is not a lane where drivers are allowed to go the speed limit to send a message to anyone who is “breaking the law” by speeding; it is not a place to make a point that you can do anything you want and be damned anyone who tells you otherwise.
Since the highway system has expanded for decades, some people either don’t know or refuse to accept what this lane is, causing accidents, wasting fuel, and fueling road rage.
But, for many states, this is changing. Thank Goodness!! Though some states have had laws on the books for years—that the left lane is for passing only —they are stepping up to the plate and enforcing those laws with hefty fines and court costs. For example, play this silly game in Kansas, and it could cost you $146, in Georgia $75, in Missouri $77, in Oklahoma a whopping $206, and in almost all other states as well, with fines varying state by state.
The economy is making things even better for those of us who have been pounding our steering wheels, cursing in the silence of our cars, and flashing our bright lights for years. In many states where this law has been relatively ignored, the need for state and local revenue increases the number of tickets for this violation. Better learn fast, left-lane gad-a-longs.
“Traffic driving in the left lane for prolonged periods does cause gridlock and backup, and it really defeats the purpose of having a multilane highway. You should remain in the right lane if you’re slower traffic.”
— Kansas Highway Patrol Trooper Edna Buttler.
According to the National Motorists Association, there are several benefits to adhering to these laws:
You’re less likely to be in an accident. By not obstructing other drivers, traffic can flow more smoothly. When traffic flows smoothly, there is less tailgating, less weaving in and out of traffic, and fewer accidents.
You’ll Get Better Gas Mileage. Lane courtesy promotes a smooth traffic flow and helps drivers maintain an even pace. Vehicles use the most gas when accelerating. Less braking and acceleration improves fuel economy.
You’ll Get To Your Destination Faster. Yielding to faster traffic reduces congestion. When traffic flows smoothly, you can use highway capacity fully.
You Will Not Have To Deal With Road Rage. Many drivers are irritated by “left lane hogs.” Moving to the right courteously can eliminate driver stress and conflict.
Though many states have signage that states “Slower Traffic Keep Right” and “Keep Right Except to Pass,” these left-lane lovers still linger. Common Practice and most laws on United States highways reserve the left lane for passing and faster-moving traffic, and traffic using the left lane must yield to traffic wishing to overtake. These laws refer to the “normal” speed of traffic, not the “legal” speed. So, if traffic flow is traveling at 60 mph in a 55 mph zone, the 55 mph driver must move right.
The United States Uniform Vehicle Code states: Upon all roadways, any vehicle proceeding at less than the normal traffic speed at the time and place and under existing conditions shall be driven in the right-hand lane.
Some defend their actions of sitting in the passing lane for mile upon mile without ever moving over, blocking traffic, causing backups, headaches, frustration, and road rage as their “right.” Still, they are more wrong as states pass new laws and enforce old ones to ease traffic flow and reduce aggressive driving. For example, Colorado states: The Colorado State Patrol is always concerned with actions that lead to aggressive driving. The longer a slower-moving vehicle occupies the left-hand travel lane, the more frustrated some drivers become, particularly when heavy traffic volume prevents vehicles from passing. Once these drivers reach their boiling point, aggressive driving and offensive gesturing become more common.
So, why do people drive in the left lane anyway?
Again, according to the National Motorists Association, these are the excuses to avoid:
Failure to yield the left lane is often caused by something as simple as not paying attention. This can still be dangerous, so it’s a good idea to merge right if you are not passing anyone.
Unfortunately, some people deliberately refuse to practice lane courtesy.
These “left-lane hogs” have all sorts of excuses for their inappropriate and unsafe behavior. They say the left lane is smoother or easier to see from. Some even claim they are doing faster drivers a favor because faster cars can stay in the right lane and don’t have to pull out to pass them.
The granddaddy of all “left-lane hog” excuses is, “I’m driving the speed limit; I shouldn’t have to move over.”
Of course, anyone who looks at speed limits on our roads knows they rarely reflect actual travel speeds. Instead, they are arbitrary, politically generated numbers unrelated to real engineering standards.
This means a driver going the speed limit in the left lane can still cause serious problems. They can cause abrupt lane and speed changes, hostility, or road rage. Even if our speed limits were more realistic, there is no good reason to remain in the left lane if a faster vehicle wishes to pass you. It only creates friction and makes our roads more dangerous.
That’s why most states have laws that regulate driving in the left lane. Some allow it only for passing, while others require slower traffic to yield the left lane if a faster vehicle approaches. To learn the laws in your state, click here.
To adhere to the law and keep our highways safe for yourself and other travelers, follow these simple rules:
- Use the left lane only when:
- You are passing another vehicle.
- You are moving over to let merging traffic onto the road
- You are moving over because there is an emergency vehicle on the shoulder (law in some states)
- You are soon going to make a left turn/take a left exit
Compiled by Kathy Alexander/Legends of America, updated September 2026.
Also See:
Offbeat Roadside Attractions, Trivia, & More
See Sources.