Cyclists in Colorado have the same basic rights and duties as drivers of motor vehicles, and several Colorado-specific laws exist to protect them on the road — which matters a great deal when it comes to proving fault after a crash. [ATTORNEY TO VERIFY: confirm current statute citations.]
What rights do cyclists have on Colorado roads?
Colorado law provides that a person riding a bicycle on a roadway generally has the same rights and is subject to the same duties as the driver of a vehicle. That means a cyclist struck by a careless driver can pursue a claim much like any other motor vehicle accident victim. [ATTORNEY TO VERIFY]
What is Colorado’s 3-foot passing law?
Colorado law (C.R.S. § 42-4-1003) requires a driver overtaking a cyclist to leave at least three feet of separation between the right side of the vehicle, including mirrors, and the cyclist, maintained until safely past — confirmed current as of 2026. If there isn’t room for a safe three-foot gap, the driver must slow down and wait. A violation is a class A traffic infraction and can serve as evidence of negligence in a subsequent injury claim.
Who is at fault if a driver opens a door into a cyclist?
Colorado law (C.R.S. § 42-4-1207, a class B traffic infraction) prohibits opening a vehicle door into moving traffic unless it is reasonably safe to do so, and bars leaving a door open longer than needed to load or unload — confirmed current as of 2026. Violating this “dooring” law is generally treated as negligence per se, meaning the driver or passenger who opened the door is presumed at fault for the resulting collision. The same is true of a 3-foot passing law violation: Colorado’s negligence per se doctrine generally means a driver who violates a safety statute like these is presumed at fault without the cyclist having to separately prove carelessness. I checked the official CJI-Civil Chapter 9 (Negligence — General Concepts): Lyons v. Nasby, 770 P.2d 1250 (Colo. 1989), is confirmed cited there for the general duty-of-care/foreseeability principle underlying Colorado negligence law, though I could not reach the specific Instruction 9:14 (Negligence Per Se) and its own case citations — the source document cut off before that instruction (a fetch limitation, not evidence the case isn’t cited there). No bicycle-specific Colorado appellate case was located applying this doctrine to the 3-foot law or dooring law by name. [ATTORNEY TO VERIFY: confirm the Instruction 9:14 Source and Authority citation directly from the firm’s CJI-Civil copy.]
How does comparative negligence affect a Colorado bicycle accident claim?
Colorado follows a modified comparative negligence rule under C.R.S. § 13-21-111 — confirmed current as of 2026: an injured cyclist can still recover damages as long as their own share of fault is under 50 percent, with recovery reduced by that percentage, but recovers nothing if found 50 percent or more at fault (the “50% bar”). Insurance companies frequently dispute a cyclist’s degree of fault, which is why documenting the scene matters.
How long do I have to file a bicycle accident claim in Colorado?
Because bicycle crashes involving a motor vehicle are treated as motor vehicle accidents, Colorado’s three-year statute of limitations under C.R.S. § 13-80-101(1)(n) applies, running from the date of the crash — confirmed current as of 2026. Missing this deadline typically bars the claim. [ATTORNEY TO VERIFY: confirm no exceptions apply to this specific client’s facts, such as a government-entity defendant with a shorter notice deadline.]
Talk to a Denver personal injury attorney
Insurance companies often try to shift blame onto cyclists after a crash. Contact Mile High Legal for a consultation to discuss your situation.
