Is Lane Splitting Legal in Montana

Lane splitting, the practice where a motorcyclist moves between lanes of slow-moving or stationary traffic, has always been a topic of debate. As motorcyclists look to navigate through congested roads more efficiently, safety concerns arise, leading to varied regulations across different states. Montana, with its expansive landscapes and open roads, is not exempt from this discussion. So, is lane splitting legal in Montana? Let’s delve into the specifics.

Montana’s Stance on Lane Splitting

As of the last update, Montana law does not explicitly permit lane splitting. Motorcyclists in Montana are expected to adhere to the same road rules as other motorists, which means staying within lanes and not weaving between cars. Engaging in such behavior could result in traffic citations or fines.

Reasons Behind the Regulation

Several factors influence Montana’s position on lane splitting:

  1. Safety Concerns: One of the primary reasons states hesitate to legalize lane splitting is safety. Concerns arise about motorcyclists potentially being struck by cars unexpectedly changing lanes.
  2. Traffic Patterns: Montana, known for its vast terrains, doesn’t face the same degree of traffic congestion as some larger metropolitan areas. Therefore, the demand or need for lane splitting may be less pronounced.
  3. Public Perception: Motorists who aren’t familiar with lane splitting may find it jarring or unpredictable, leading to potential road conflicts or misunderstandings.

Benefits and Drawbacks of Lane Splitting

  • Benefits:
    • Reduces traffic congestion.
    • Allows motorcyclists to escape rear-end collisions during standstills.
    • Can reduce the risk of motorcyclists suffering from heat exhaustion in traffic.
  • Drawbacks:
    • Increased risk of collisions with vehicles unaware of the motorcyclist.
    • Potential for increased road rage incidents.
    • Challenges in enforcement and regulation.


Are there states where lane splitting is legal?

Yes, California is the most notable state where lane splitting is explicitly legal, provided it’s done safely.

Does Montana have any provisions for lane filtering or lane sharing?

Lane filtering (motorcyclists moving to the front of traffic stopped at traffic lights) and lane sharing (two motorcyclists in the same lane) are also areas governed by specific state laws. In Montana, there aren’t explicit allowances for these practices like lane splitting.

What are the penalties for lane splitting in Montana?

Penalties may include fines, traffic citations, or even higher insurance premiums depending on the nature and frequency of infractions.


Lane splitting remains a controversial topic in road safety and traffic management. While Montana currently does not permit this practice, it’s essential for motorcyclists to stay updated on state laws and always prioritize safety on the roads.

By Nichole