San Diego Bicycle Laws: Guide for Cyclists & Drivers
Sharing the Road in San Diego: What You Need to Know
San Diego’s beautiful coastal roads, mild weather, and active community make it a prime city for cycling. But with more bicycles on the road comes a greater need for everyone—cyclists and drivers alike—to understand the rules that govern safe riding. In California, bicycles are legally considered vehicles, and cyclists are expected to follow most of the same laws as motorists.
Whether you're a daily commuter, weekend rider, or motorist sharing the road, this guide breaks down the most important bicycle laws and safety rules in San Diego.
Traffic Laws for Cyclists: Bicycles Are Vehicles
In San Diego, bicycles are legally considered vehicles, meaning cyclists are required to follow the same traffic laws as motorists. (Cal. Veh. Code § 21200.) Here are some key traffic laws that apply to cyclists:
Use of Roadways
Bicyclists traveling slower than normal traffic must stay as close as practicable to the right-hand curb or edge of the road, except when passing, turning, or avoiding hazards. Bicyclists moving at the speed of traffic can ride within the travel lane. (Cal. Veh. Code § 21202.)
Use of Bike Lanes
When a bike lane is available, cyclists are generally required to use it. However, they may leave the bike lane to pass, make turns, or avoid hazards. (Cal. Veh. Code § 21208.)
Obey Traffic Signals and Signs
Cyclists must stop at red lights and stop signs, yield where appropriate, and follow all posted traffic signs and signals. Running a red light or stop sign is illegal and dangerous for cyclists.
Ride in the Direction of Traffic
Cyclists must ride in the same direction as car traffic, not against it. (Cal. Veh. Code § 21650.) This is critical for safety, as it makes cyclists more predictable to drivers.
Signaling
Cyclists are required to signal their intentions when turning or stopping, similar to motorists. For instance, extending the left arm straight out indicates a left turn, and a bent arm with the hand pointing up indicates a right turn.
Riding Side-by-Side
Cyclists may ride side-by-side (two abreast) on the road, but only if it does not impede traffic. If riding in traffic, cyclists should stay in single file to allow cars to pass safely.
Helmet Requirements: Safety First
Helmet use is an essential aspect of cycling safety and is mandated by law for certain age groups:
Riders Under Age 18
California state law requires that all cyclists under 18 years old wear a helmet while riding a bicycle, whether on streets, bike paths, or trails. The helmet must fit properly and meet safety standards set by the U.S. Consumer Product Safety Commission. (Cal. Veh. Code § 21212.)
Riders Over Age 18
While helmet use is not legally required for adults over 18, it is strongly recommended. Wearing a helmet significantly reduces the risk of head injuries in an accident, and many San Diego cyclists choose to wear one for their protection.
E-Bikes and Electric Scooters
Riders of Class 3 e-bikes (those that can reach speeds up to 28 mph) must wear helmets, regardless of age. This applies to e-scooter riders as well. (Cal. Veh. Code § 21212.)
Helmet use is critical for safety, as head injuries are one of the most common injuries in bicycle accidents. Even experienced cyclists are encouraged to wear helmets, as the unexpected can happen on the road.
Right-of-Way Rules: Ensuring Safe Interaction with Motor Vehicles and Pedestrians
The rules governing the right of way help to prevent collisions and ensure the safe sharing of roads between cyclists, motorists, and pedestrians. Key right-of-way rules for cyclists include:
Yielding to Pedestrians
Cyclists must always yield to pedestrians in crosswalks and on shared paths. It’s important to be cautious and courteous when approaching intersections or shared spaces, as sudden movements can cause accidents. (Cal. Veh. Code § 21950.)
Respecting Crosswalks
Cyclists are encouraged to walk their bikes across crosswalks if they are crossing as pedestrians. However, if riding across, they must yield to pedestrians. (Cal. Veh. Code § 21950.)
Right of Way in Bike Lanes
When riding in a bike lane, cyclists have the right of way over motor vehicles that may cross the lane to turn. However, it’s essential for cyclists to remain alert to avoid conflicts with turning vehicles.
Passing and Being Passed
When riding on a roadway without a bike lane, cyclists should stay as close to the right as is safe. Drivers passing cyclists must provide at least three feet of clearance, as required by California’s “Three Feet for Safety” law.
Turning and Merging
When making a left turn, cyclists should merge into the left-turn lane, following the same rules as vehicles. It’s crucial to signal intentions early and be aware of traffic behind and beside them.
Right-of-way rules are essential for maintaining a predictable flow of traffic and reducing the likelihood of accidents involving cyclists and other road users.
Cell Phone Use While Driving: What Cyclists Need to Know About Distracted Driving Laws
Distracted driving is one of the leading causes of bicycle accidents in San Diego. California has strict laws in place to reduce the dangers of cell phone use behind the wheel—but unfortunately, they’re not always followed.
What the Law Says
Under California Vehicle Code § 23123, it is illegal for drivers to hold a phone while driving. All cell phone use must be hands-free, and drivers under 18 may not use a phone at all—hands-free or otherwise.
Key Rules for Drivers:
- No holding or touching a phone while driving (even at a red light).
- Hands-free systems (like Bluetooth) are allowed, but only for adult drivers.
- Texting, scrolling, or using apps while driving is prohibited.
- First offense carries a base fine of $20—but with penalties, the total cost can be over $150.
Why It Matters to Cyclists
Drivers who text, scroll, or make calls while driving are significantly more likely to miss seeing cyclists—especially at intersections or when merging. Many of the cases we handle at Hulburt Law Firm involve motorists who were distracted in the moments leading up to a crash.
Legal note: If a driver was using their phone when they hit a cyclist, it can be a powerful factor in proving negligence and strengthening your claim for compensation.
If you were injured by a distracted driver, we can help gather phone records, traffic cam footage, and witness statements to build a strong case on your behalf.
Night Riding: Visibility Is the Law
Visibility is a significant concern for cyclists, especially when riding at night or in low-light conditions. To enhance safety and visibility, San Diego enforces specific requirements:
Front Light
Cyclists must equip their bicycles with a white light visible from at least 300 feet when riding in the dark. (Cal. Veh. Code § 21201.) This helps motorists see cyclists approaching or crossing intersections.
Rear Reflector
Bicycles are required to have a red reflector on the rear, visible from 500 feet when illuminated by headlights. (Cal. Veh. Code § 21201.) A rear red light, while not legally required, is highly recommended for added visibility.
Pedal and Wheel Reflectors
Bicycles must have reflectors on both the pedals (or the cyclist’s shoes) and the side of the wheels to ensure visibility from different angles. (Cal. Veh. Code § 21201.)
Following these visibility laws helps prevent nighttime accidents, which often occur because drivers fail to see cyclists in the dark. Investing in high-quality lights and reflective gear can make a big difference in cyclist safety.
Local San Diego Bike Ordinances and City-Specific Rules
While California sets the foundation for bicycle law, many cities in San Diego County add their own local ordinances. These rules can significantly impact where and how you ride—especially when it comes to sidewalks, business districts, and local infrastructure.
Sidewalk Riding Varies by City
Some cities allow sidewalk riding, while others restrict or prohibit it entirely:
- City of San Diego: Bicyclists may ride on sidewalks except in business districts. If riding on the sidewalk, cyclists must yield to pedestrians and ride at a safe speed.
- Carlsbad, El Cajon, Vista, and Poway: Sidewalk riding is prohibited in most areas.
- Chula Vista and Oceanside: Local rules allow sidewalk riding but may have restrictions near commercial zones or high-traffic areas.
Legal tip: If you're injured while riding on a sidewalk in a city that prohibits it, this could affect your legal claim. It’s important to know the rules in your riding area.
City-Specific Bike Lanes and Routes
San Diego has invested heavily in protected bike lanes, cycle tracks, and shared-use paths—especially through SANDAG’s Regional Bike Plan. But the presence and enforcement of bike lanes vary by neighborhood.
Resources to know:
Before you ride in a new area, check local city websites or contact your city’s transportation department to stay updated on infrastructure and restrictions.
Additional Safety Laws and Best Practices for San Diego Cyclists
While not necessarily laws, several best practices are recommended for cyclists in San Diego:
Stay Alert and Avoid Distractions
Just like drivers, cyclists should avoid distractions like headphones or cell phones that take their attention away from the road. Like drivers, cyclists are prohibited from wearing headphones in both ears while riding. (Cal. Veh. Code § 27400.)
Be Aware of “Dooring”
Cyclists riding near parked cars should stay far enough to avoid being hit by an opening car door. Motorists are encouraged to use the “Dutch Reach” (opening the door with their far hand) to check for approaching cyclists.
Follow Safe Passing Protocols
If passing another cyclist or pedestrian on a path, announce your intentions verbally or with a bell.
Alcohol and Drugs
Bicyclists may not ride under the influence of alcohol or drugs. (Cal. Veh. Code § 21200.5.)
Why Bicycle Laws Matter
Bicycle laws in San Diego are designed to keep cyclists and other road users safe, prevent accidents, and foster a respectful and predictable road environment. Adhering to these laws not only helps reduce the risk of injury but also supports the rights of cyclists to share the road confidently and safely.
What If a Driver Breaks These Laws and Causes a Crash?
When motorists violate the law—by failing to yield, driving distracted, or making unsafe passes—the consequences for cyclists can be severe. Under California law, cyclists have a right to compensation if they’re injured due to someone else’s negligence.
“Many of the bicycle crash victims we represent were doing everything right—but paid the price for a driver’s mistake. Knowing your rights is the first step. Enforcing them is where we come in.”— Conor Hulburt, Founding Attorney
Need Legal Help After a Bicycle Accident? Hulburt Law Firm Can Help
If you’ve been involved in a bicycle accident in San Diego, understanding the local laws is just the beginning. Our San Diego Bicycle Injury Lawyers can help you understand your rights, navigate insurance claims, and pursue compensation for injuries or damages.
At Hulburt Law Firm, we’re here to provide guidance, support, and legal representation to injured cyclists. Founders Conor and Leslie Hulburt are committed to seeking justice and fair compensation for their clients, because The Truth Demands Justice.
Reach out to Hulburt Law Firm today for a free consultation.
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