In Colorado, the left lane is reserved for passing slower traffic, and it’s more than just a good driving habit—it’s the law. Known as the “Left Lane Law,” this regulation aims to improve traffic flow and enhance road safety on Colorado’s highways. Let’s take a closer look at what the Left Lane Law entails, why it exists, and how it impacts Colorado drivers.
What is Colorado’s Left Lane Law?
Under Colorado Revised Statute 42-4-1001, the Left Lane Law requires drivers to use the left lane only for passing other vehicles or when preparing to make a left turn. This law applies on highways with speed limits of 65 MPH or higher. In essence, drivers are expected to keep to the right unless they are actively passing, allowing the left lane to remain open for vehicles traveling at higher speeds or needing to overtake slower traffic.
Why Does Colorado Have a Left Lane Law?
The main purpose of the Left Lane Law is to maintain smooth traffic flow and prevent traffic congestion, especially on high-speed highways. When drivers linger in the left lane without passing, it can create bottlenecks and force other drivers to weave between lanes, increasing the chances of crashes. By keeping the left lane clear for passing, Colorado aims to reduce frustration, increase safety and improve travel times for everyone on the road.
Exceptions to the Law
The Left Lane Law includes a few exceptions. Drivers may use the left lane when:
· Heavy traffic in the right lane prevents safe merging
· Preparing to make a left turn or exit
· When specific traffic conditions or signage direct left-lane use
Enforcement and Fines
Colorado law enforcement takes left-lane violations seriously and will give citations for violations which can include fines and additional penalties based on circumstances of the citation. In addition to fines, improper left-lane driving increases the likelihood of being involved in crashes due to sudden lane changes by other drivers.
You can learn more from Colorado State Patrol by watching their video here.