The best lane position for approaching a curve is the outside edge of your lane. For a right-hand curve, that means positioning toward the left side of your lane. For a left-hand curve, it means shifting toward the right side. This outside position gives you two critical advantages: a longer line of sight through the curve and a wider, gentler arc that reduces the forces pushing your vehicle toward the edge of the road.
Why the Outside Position Works
When you approach a curve from the outside of your lane, you effectively increase the radius of the path your vehicle follows. The physics here are straightforward: the force pulling your car sideways through a curve equals your mass times your speed squared, divided by the radius of the curve. A larger radius at the same speed means less sideways force on your tires. Less force means more grip in reserve, which translates to a bigger margin of safety if you need to brake or if the road is wet.
The visibility benefit is equally important. Standing at the outside of your lane lets you see farther around the bend. The point where the road disappears from your view, sometimes called the “limit point” or vanishing point, moves farther away when you position yourself on the outside. That extra distance gives you more time to spot hazards: a stalled car, gravel on the pavement, or an oncoming vehicle drifting into your lane. The fundamental question you should be asking yourself at every point in a curve is whether you could stop safely if something appeared in the road right now. Starting from the outside gives you the best chance of answering yes.
The Outside-Inside Technique
The full technique works in stages. You set up toward the outside of your lane before you enter the curve, which maximizes your view. You hold that outside position until you can see through the curve and confirm the road is clear. Then you gradually move toward the inside of the curve (the apex) while maintaining or gently increasing speed. After passing the apex, you let the vehicle drift back toward the outside as you exit.
This outside-inside path is sometimes described as “opening up” the curve. You’re using the full width of your lane, not the full width of the road, to create the gentlest possible arc. The key detail is when you reach the inside point. For everyday road driving, aiming for a late apex, meaning you reach the inside of the curve later than the geometric midpoint, is the safer choice. A late apex keeps you on the outside longer, giving you more visibility before you commit to your line. It also means you’re accelerating out of the curve on a straighter path rather than running wide at the exit. Rally driving instructors refer to the late apex as the “safe apex” because it accounts for the unknowns: curves that tighten unexpectedly, debris, or anything else you couldn’t see on entry.
Left Curves vs. Right Curves
On a left-hand curve, the outside of the curve is the right side of your lane. This position keeps you away from the center line and oncoming traffic, which is a natural safety buffer. You have good visibility because the road curves away from you toward your left.
Right-hand curves are trickier. The outside of the curve is the left side of your lane, closer to the center line and oncoming traffic. You gain the visibility and radius advantages, but you’re also closer to vehicles coming the other direction. If you’re on a narrow road or there’s heavy oncoming traffic, you may need to compromise your ideal position and stay a bit farther from the center line. The geometry still favors the outside entry, but safety from oncoming vehicles takes priority over the perfect arc.
Lane Positioning for Motorcyclists
Motorcyclists think about lane position in thirds, often labeled positions 1 (left third), 2 (center), and 3 (right third). The same outside-entry principle applies, but riders have additional concerns because a motorcycle’s smaller profile makes visibility critical in both directions: seeing the road and being seen by other drivers.
For a left curve, position 3 (right third) is generally the best starting point. It gives you the outside advantage and keeps you away from oncoming traffic that might drift wide. For a right curve, position 1 (left third) provides the outside line, but Maryland’s Zero Deaths safety program notes that position 3 is a good choice “if you’re rounding a curved road where there’s a danger of oncoming traffic crossing the center line.” Motorcyclists should also watch for hazards that cars can ignore: oil slicks, painted road markings, and metal grates that become slippery in wet conditions. These are often concentrated in the center of the lane (position 2), which is another reason the outside third is preferable.
Why Cutting the Curve Is Dangerous
The instinct many drivers have is to cut to the inside of a curve early, shaving the corner to keep the steering wheel as straight as possible. This is the opposite of the recommended approach, and it’s directly linked to crashes. Federal Highway Administration data shows that 11 percent of curve-related crashes are head-on collisions caused by a vehicle drifting into the opposing lane, typically when a driver tries to cut the curve or overcorrects after running onto the shoulder.
Cutting to the inside early creates two problems simultaneously. First, it shortens your sight line. You can’t see what’s ahead because the inside of the curve blocks your view. Second, it sets you on a path that swings wide at the exit, pushing you toward the outside edge of the road or into oncoming traffic just as you’re trying to straighten out. The combination of poor visibility and an exit that drifts wide is exactly how run-off-road crashes happen on curves.
Trucks and Longer Vehicles
If you drive a truck, SUV towing a trailer, or any longer vehicle, curves demand extra attention because of a phenomenon called off-tracking. The rear wheels of a long vehicle follow a tighter path than the front wheels. At highway speeds on a curve, the trailer can track several inches outside the path the cab is following. For triple-trailer combinations, high-speed off-tracking can be 8 to 9 inches greater than a standard vehicle.
To put that in perspective, a standard truck in a 12-foot lane only has about 21 inches of clearance from the center of its axle to the lane edge. Off-tracking eats into that margin quickly, especially on tighter curves. Highway designers account for this by widening lanes on curves by roughly 14 inches, but not every road is designed to current standards. If you’re driving a long vehicle, staying aware of where your rear end is tracking, and entering curves a bit slower than you might in a car, keeps your trailer inside the lane lines.
Speed Matters as Much as Position
Lane position and speed work together. The best lane position in the world won’t save you if you enter a curve too fast. The practical approach is to do your braking before you reach the curve while you’re still traveling in a straight line. Braking in a curve shifts weight forward, reduces rear tire grip, and can cause understeer (the car plows straight) or oversteer (the rear swings out). Neither is something you want on a public road.
Once you’ve set your entry speed and begun the outside-inside path, you should be either maintaining speed or gently accelerating through the second half of the curve. Accelerating shifts weight to the rear tires, which stabilizes the vehicle. This is why the late apex works so well: by the time you’re accelerating, you’re already past the tightest part of the curve and pointed toward the exit, so you’re adding speed on an increasingly straight line rather than in the middle of the bend.