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As a rider, at what point can you enter the bike lane?..

Written by Remington Fang

June 27, 2025

Going through Denver’s busy streets by bike often raises a critical question: at what point can you enter the bike lane? This is more than a matter of road etiquette—it’s about safety and legal clarity. At Fang Accident Lawyers, we know the rules surrounding bike lanes can be confusing, especially when cyclists and drivers must coexist in tight traffic conditions. We will unpack Colorado’s bicycle laws, clarify how and when the bike lane can be used, and offer legal insight for those involved in cycling accidents.

at what point can you enter the bike lane

Bicycle rules in Colorado

Colorado law treats bicycles as vehicles, meaning riders must obey the same rules that apply to cars and trucks. As outlined by Bicycle Colorado, this includes stopping at red lights and stop signs, yielding to pedestrians in crosswalks, and riding in the same direction as traffic.

State law generally requires cyclists to use a dedicated bike lane when it’s available unless it’s unsafe or impractical. This includes avoiding debris, overtaking another cyclist, or preparing for a left-hand turn. The law also permits cyclists to ride two abreast within a single lane but encourages single-file riding when traffic conditions demand it for safety.

Understanding these regulations helps prevent both legal citations and conflicts on the road. Knowing when it is permissible to exit a bike lane isn’t just about compliance—it’s about preserving the safety of everyone sharing Denver’s streets.

Can a driver use the bike lane?

This is where much of the confusion arises. Drivers are prohibited from driving in bike lanes except under specific conditions. In Denver and throughout Colorado, a motor vehicle may only enter a bike lane within 200 feet of making a turn. This regulation aims to minimize the time cars and bikes share that narrow strip of road.

Colorado law permits vehicles to enter the bike lane shortly before turning for right turns, but only when it can be done safely and without impeding a cyclist’s right of way. Drivers should always signal their intentions and check blind spots before merging into a bike lane.

Failing to follow these rules can result in a moving violation, but more importantly, it places vulnerable road users at risk. Many bicycle accidents occur when vehicles enter bike lanes too early or without proper signaling. As a firm committed to protecting injured cyclists, we’ve seen firsthand how easily a moment of distraction can turn into a life-altering crash.

What if there’s no bike on the bike lane?

Some drivers mistakenly believe that a bike lane is open for vehicle use if it is empty. That’s not the case. The absence of a cyclist does not negate the restriction against driving in a designated bike lane.

Colorado’s road rules are clear: bike lanes are off-limits to motor vehicles except when preparing for a turn within a legally allowed distance, even if no cyclists are present—crossing the bike lane prematurely or using it as a shortcut is unlawful and potentially dangerous.

It’s not about the immediate presence of a cyclist—it’s about preserving a predictable, safe environment for all road users. Bicyclists rely on consistent behavior from drivers to make informed decisions. When a car encroaches unexpectedly, the risk of collision increases significantly.

Common Mistakes Drivers Make Around Bike Lanes

Even with marked bike lanes and straightforward laws, many drivers unintentionally create hazardous situations for cyclists. One of the most common mistakes is entering the bike lane too early before turning, violating the 200-foot rule, and unexpectedly cutting off riders. Others use bike lanes as extra space to bypass traffic, double-park, or stop momentarily, creating unpredictable obstacles for cyclists.

Failing to check blind spots, especially during right-hand turns, is another frequent issue. Many drivers underestimate how quickly cyclists can approach and misjudge their speed or position. Skipping turn signals, assuming the bike lane is empty, or simply being distracted behind the wheel all contribute to preventable collisions.

Road Safety Tips for Cyclists and Motorists

Safe road-sharing starts with deliberate actions. Cyclists should wear bright, reflective gear and always use lights in low visibility. Helmets are essential for reducing injury risk. Motorists must give cyclists space, check mirrors and blind spots, and avoid using phones behind the wheel. Both should obey traffic laws, remain alert, and signal their movements. These proactive habits reduce misunderstandings and accidents, helping ensure everyone gets home safely, whether on two wheels or four.

For Cyclists:

  • Follow all posted traffic signs and signals, and ride in the same direction as vehicle flow.
  • Wear a helmet,  high-visibility clothing, and use reflective gear, especially during evening hours or poor lighting conditions.
  • Signal your turns or stops with hand gestures to alert others on the road.
  • Keep your bicycle in good working condition and ride in a controlled, defensive manner.
  • Watch for opening car doors, turning vehicles, and other road hazards.
  • Choose routes that account for traffic patterns and remain conscious of vehicle blind spots.

For Drivers:

  • Maintain a safe distance from cyclists, allowing room for sudden movements or swerves.
  • Always check mirrors and blind spots for cyclists before turning or switching lanes.
  • Approach intersections cautiously, watching for cyclists entering from various directions.
  • Refrain from using or blocking bike lanes—they serve a critical safety function.
  • Keep your focus on the road; avoid distractions like texting or handling electronic devices.
  • Use your turn signals early to indicate lane changes or turns.
  • Provide extra clearance when passing cyclists, especially at higher speeds or in poor weather conditions.

The Colorado Department of Transportation states that these everyday choices reduce accidents and keep things moving smoothly.

Contact a Denver Bicycle Accident Attorney Today

Whether you’re a commuter, weekend rider, or someone recently injured while cycling, understanding your rights on the road is crucial. If you’ve been involved in an accident, our legal team is here to help.

At Fang Accident Lawyers, we offer free case evaluations and direct communication with an attorney from day one. Call us at 720-379-6363 to schedule your consultation—we’re ready to help you get the answers and support you deserve.

Remington W. Fang

A Colorado Springs native with a lifelong passion for standing up to bullies, Remington fights for the injured against corporations that put profit over people. Raised in a family devoted to service and healing, he brings compassion and grit to every case.

A graduate of the University of Northern Colorado and the University of Arkansas School of Law, Remington has recovered millions for clients with Fang Accident Lawyers. He believes no injury should silence the human spirit — and he won’t stop fighting until justice is served.

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This page has been written, edited, and reviewed by a team of legal writers following our comprehensive editorial guidelines. It was approved by Remington W. Fang, our Founding Partner, who brings over 10 years of experience as a personal injury attorney.