Bicycle riders are generally required to follow the same traffic laws as motor vehicle drivers. That means obeying stop signs, traffic lights, lane markings, and all other regulatory signs. Beyond those basics, there are specific regulations covering everything from where you ride on the road to what equipment your bike needs. Here’s what you need to know.
Ride With Traffic, Not Against It
You must ride on the right side of the roadway, moving in the same direction as traffic. Riding against traffic is one of the most dangerous things a cyclist can do because it dramatically reduces reaction time for both you and oncoming drivers. Exceptions exist for passing another vehicle, making a legal left turn, riding on a one-way street, or when the right side of the road is closed for construction.
Where you position yourself within a lane matters too. If a lane is wide enough to safely share with a car (roughly 14 feet), ride about three feet to the right of traffic. If the lane is too narrow to share, you’re generally permitted to “take the lane” by riding in the middle. This prevents drivers from trying to squeeze past you in a space that isn’t wide enough for both of you. Always pass other vehicles and cyclists on the left.
Hand Signals Every Rider Should Know
Since bicycles don’t have turn signals or brake lights, you’re expected to communicate your intentions with hand signals. There are three essential ones:
- Left turn: Extend your left arm straight out to the side, fingers extended or pointing with your index finger.
- Right turn: Extend your right arm straight out to the side. An older, alternate method involves extending your left arm and bending it upward at the elbow, but pointing with your right arm is more intuitive for everyone on the road.
- Slowing or stopping: Extend your left arm and bend it downward at the elbow, hand pointing toward the ground. This is especially important because without brake lights, the driver behind you has no other way to know you’re about to slow down.
Signal well before you make your move, and return both hands to the handlebars before you actually turn or stop so you maintain full control of the bike.
Lights and Reflectors After Dark
Riding at night or in low-visibility conditions without proper lighting is both illegal in most places and extremely risky. The typical requirement is a white front light visible from at least 500 feet and a red rear reflector (or red light) visible from at least 600 feet. These distances ensure that drivers have enough time to see you and react.
“Limited visibility” doesn’t just mean nighttime. It covers the period from sunset to sunrise and any conditions, like fog, heavy rain, or dusk, where a person or vehicle wouldn’t be clearly visible at 1,000 feet on an unlit road. If you can’t see well, assume drivers can’t see you either.
Helmet Requirements Vary by Age
There is no federal helmet law in the United States, but 21 states and the District of Columbia have mandatory helmet laws for children, all covering riders under 18. Some local municipalities extend helmet requirements to all ages. Research from Canada found that helmet use was highest in provinces with laws covering all ages and lowest in provinces with no law at all, and that even laws targeting only those under 18 reduced head injury hospitalizations among adults too, likely by shifting cultural norms around helmet use.
Even where helmets aren’t legally required for adults, wearing one remains the single most effective way to reduce the severity of a head injury in a crash.
Bells and Audible Warnings
Some states require an audible warning device on every bicycle. New York, for example, mandates that a bicycle be equipped with a bell, horn, or other device that can be heard from at least 100 feet away. Even where it’s not a legal requirement, a bell is invaluable for alerting pedestrians on shared paths and other cyclists that you’re approaching.
Headphones and Hearing
Wearing headphones while cycling is restricted in several states. California law prohibits wearing headphones or earbuds in both ears while riding. You can wear a single earbud in one ear, but the other must remain open so you can hear traffic, sirens, and other sounds around you. Hearing aids and devices designed to protect against harmful noise levels are exempt. Other states have similar restrictions, so check your local vehicle code before riding with music.
Sidewalk Riding Rules
No blanket federal or state law prohibits riding on sidewalks in most states. Texas, for instance, has no statewide ban. However, many cities and towns have local ordinances that restrict or prohibit sidewalk riding, particularly in busy downtown or commercial areas. Look for posted signs, and contact local authorities if you’re unsure. When you do ride on a sidewalk where it’s allowed, you must yield to pedestrians and cannot block normal foot traffic. If you park your bike on a sidewalk, it can’t obstruct the path of people walking.
Riding Under the Influence
You can be charged for riding a bicycle while intoxicated in many states. In Georgia, the same blood alcohol limits that apply to motor vehicles apply to bicycles: 0.08 percent for adults over 21, and 0.02 percent for those under 21. Penalties can include fines of $300 to $1,000, jail time, and mandatory community service. The one significant difference from a motor vehicle DUI is that a cycling-under-the-influence conviction typically does not result in suspension of your driver’s license. Still, impaired cycling puts you at serious risk of injury since your balance, reaction time, and judgment are all compromised.
E-Bike Classifications and Where They Can Ride
Electric bicycles are regulated under a three-class system that most states have adopted. All classes are limited to motors under 750 watts and must have fully operable pedals and a seat.
- Class 1: The motor only assists when you’re pedaling and cuts off at 20 mph.
- Class 2: The motor can propel the bike without pedaling but also cuts off at 20 mph.
- Class 3: The motor assists only while pedaling and cuts off at 28 mph.
Class 1 and Class 2 e-bikes are generally allowed wherever traditional bicycles are permitted, including most bike paths. Class 3 e-bikes, because of their higher speed, are often restricted from multi-use paths and may require the rider to be at least 16 years old and wear a helmet. Local rules vary, so check whether your trail or bike lane has specific e-bike restrictions posted.
Parking Your Bike Legally
When you lock up your bicycle, it cannot obstruct pedestrian walkways or block designated bike lanes. Missouri law, as one example, specifically prohibits any stationary object from obstructing a designated bicycle lane. In practice, this means locking your bike to designated racks or posts rather than blocking sidewalks, building entrances, accessibility ramps, or transit stops. Many cities have ordinances spelling out exactly where bikes may and may not be secured on public property.