Cyclists are regular traffic. They have the legal right to use public roads, and in many situations they’ll occupy the full lane rather than hugging the curb. If you drive regularly in urban or suburban areas, understanding why cyclists behave the way they do will make every encounter smoother and safer for both of you.
Why Cyclists Take the Full Lane
One of the most common frustrations drivers express is seeing a cyclist riding in the center of a lane rather than off to the side. This isn’t reckless or inconsiderate. Cyclists have the legal right to occupy a full lane when safety requires it, such as when avoiding parked cars, debris, potholes, or when the lane is too narrow for a car and bike to travel side by side safely. On roads without bike lanes, full-lane positioning is often the safest option available.
Riding near the edge of the road exposes cyclists to hazards you might not notice from behind a windshield: sewer grates, crumbling pavement, glass, and the doors of parked cars. When a cyclist moves toward the center, they’re creating a buffer zone between themselves and those dangers. They’re also making themselves more visible to you and to drivers pulling out of side streets and driveways. The instinct to squeeze past a cyclist in a narrow lane is exactly the scenario lane positioning is designed to prevent. If there isn’t enough room to pass with several feet of clearance, waiting until the road widens is the expected and legal approach.
Reading Cyclist Hand Signals
Cyclists can’t flick a turn signal, so they communicate with hand signals that follow a standard pattern. Knowing what these look like helps you anticipate their next move instead of reacting to it.
- Left turn: The cyclist extends their left arm straight out to the side. Some cyclists extend their right arm instead.
- Right turn: The cyclist bends their left elbow upward, pointing their left hand toward the sky.
- Stopping or slowing: The cyclist bends their left elbow downward, angling their left hand toward the ground.
These signals are often held briefly, because the cyclist needs both hands back on the handlebars to brake or steer. If you see a raised or extended arm, give the cyclist a moment to complete the maneuver before you accelerate past.
Groups Riding Two Abreast
Encountering a group of cyclists riding side by side can feel like they’re deliberately blocking you, but two-abreast riding is legal in most jurisdictions as long as the group isn’t obstructing traffic. In California and many other states, it’s explicitly permitted. The UK’s Highway Code similarly allows it under Rule 66.
There are practical safety reasons for it. Two cyclists riding side by side are far more visible to drivers than a single-file line, which reduces the chance of a car attempting a dangerously close pass. Counterintuitively, the side-by-side formation also makes overtaking easier: it shortens the overall length of the group, so you spend less time in the oncoming lane when you pass. The formation also creates a natural barrier that gives the inside rider more protection from motor vehicles.
Experienced group riders will typically single up when approaching bends, narrow roads, or when a line of vehicles builds behind them. In some states, cyclists are required to ride single file if they’re causing a delay of five or more vehicles. If you’re waiting behind a group on an open road, a brief, polite tap of the horn (not a sustained blast) can alert them to traffic building up. Most group riders are already watching for this and will adjust.
Stop Signs and Red Lights
You may occasionally see a cyclist slow through a stop sign without fully stopping. In roughly a dozen U.S. states, this is perfectly legal under what’s known as the “Idaho Stop,” named after the first state to adopt it in 1982. New Mexico is among the most recent to enact the law.
Under these rules, cyclists approaching a stop sign may slow down, yield to any traffic that has the right of way, and proceed through the intersection without a complete stop if it’s safe. At red lights, the rules are stricter: cyclists must come to a full stop but can then proceed if the way is clear. The logic behind these laws is that a bicycle’s slower speed, smaller profile, and wide sightlines at intersections make the rolling yield both safe and practical. In states without an Idaho Stop law, cyclists are expected to follow the same stop sign and red light rules as cars. Either way, if you arrive at an intersection at the same time as a cyclist, standard right-of-way rules apply.
The Dooring Danger
If you park on a street where cyclists ride, how you open your car door matters more than you might think. In 2013, 22% of bike accidents involving cars in Boston were caused by “dooring,” where a driver or passenger opens a door directly into a cyclist’s path. At cycling speeds, there’s almost no time to react.
The simplest prevention technique is the “Dutch Reach.” Instead of opening your door with the hand closest to it, reach across your body with your far hand. If you’re in the driver’s seat, that means your right hand. This motion naturally rotates your torso and head, forcing you to look at the side mirror and then over your shoulder before the door opens. It also physically limits how far you can swing the door, preventing the sudden wide-open thrust that catches cyclists off guard. Illinois is among the states that have actively promoted the technique. It takes a few tries to make it a habit, but it’s one of the easiest things a driver can do to prevent a serious collision.
Visibility and Lighting
Cyclists are harder to see than cars, especially at dawn, dusk, and night. Federal standards require bicycles sold in the U.S. to come equipped with a colorless front reflector, a red rear reflector, reflectors on both sides of each pedal, and a reflector mounted on the spokes of each wheel (or reflective rims or tire sidewalls). These are minimum requirements, and many serious cyclists add battery-powered front and rear lights that far exceed what reflectors alone provide.
Even so, reflectors only work when your headlights hit them at the right angle. Expect cyclists to be less visible than you’d like, particularly on roads without streetlights. Scanning the road further ahead than you normally would, especially in the rightmost portion of the lane, helps you spot a cyclist before you’re right behind them. On two-lane roads, dipping your high beams for a cyclist is just as important as doing it for an oncoming car, since the glare can temporarily blind a rider who has no windshield to filter it.
Passing Safely
Many states now have specific passing distance laws for cyclists, typically requiring three feet of clearance or more. Even where no specific law exists, the principle is the same: treat a cyclist like a slow-moving vehicle and pass only when you can move fully or partially into the adjacent lane. Squeezing past within the same lane, especially at speed, creates a wind effect that can destabilize a rider.
Before you pass, check for oncoming traffic and give the cyclist as wide a berth as you would a parked car. After passing, avoid cutting back into the lane too quickly. Cyclists travel faster than most drivers realize, often 15 to 25 mph on flat roads, and a sudden lane reentry can force them to brake hard. If you’re turning right shortly after passing a cyclist, wait. Overtaking and then immediately turning across their path (known as a “right hook”) is one of the most common car-bike collision patterns.