Is Lane Splitting Legal in Iowa?

Motorcycle riding offers freedom on the road, but it comes with responsibilities and rules that every rider needs to understand. One topic that sparks frequent discussion is lane splitting. If you’ve found yourself wondering, “Is lane splitting legal in Iowa?“—the answer is NO. It is not legal to split lanes on a motorcycle in Iowa. Read on for more information on lane splitting in this guide compiled by the experienced personal injury lawyers in our law firm.

What Is Lane Splitting?

Motorcycle lane splitting occurs when a motorcyclist rides between two lanes of stopped traffic or slow-moving traffic. Many motorcycle riders use this technique to bypass congestion, save time, and avoid sitting in long traffic jams. It can be unsafe when motorcycles split lanes, especially in states where drivers aren’t accustomed to the practice.

Rules for Motorcyclists: Lane Sharing, Lane Splitting, Lane Filtering, and Shoulder Surfing

Lane Sharing

Iowa allows lane sharing, but only two motorcycles can ride side-by-side in the same lane.

Lane Splitting

Lane splitting—also called white lining or stripe riding—occurs when a motorcycle moves between lanes of slow or stopped vehicles; all are traveling in the same direction. Iowa specifically prohibits lane splitting.

Lane Filtering

Lane filtering refers to a motorcycle moving between two vehicles to move to the front of traffic at a signal or intersection. Is lane filtering legal in Iowa? NO, it is not.

Shoulder Surfing

Shoulder surfing means riding a motorcycle on the road’s shoulder to pass other traffic. Changing lanes in this way is illegal in Iowa.

Is Lane Splitting Legal in Iowa?

Iowa traffic laws prohibit motorcycles from lane splitting. Iowa Code Section 321.275 specifies a motorcycle or motorized bicycle shall not be operated between lanes of traffic, adjacent marked lanes, rows of slow-moving vehicles, or stopped cars.

What Are the Penalties for Lane Splitting in Iowa?

Iowa Code Section 321.275 outlines rules for operating motorcycles and motorized bicycles, including restrictions on carrying passengers, lane usage, and equipment requirements. However, it does not explicitly mention penalties for violations within the section itself. Penalties for breaking these rules would likely depend on broader traffic laws in Iowa.

Where Is Lane Splitting Legal?

Lane splitting laws vary across the United States. While Iowa prohibits it, states like California and Minnesota explicitly allow it. Other states, like Arizona and Colorado, permit variations of lane splitting. Many states remain silent, leaving the practice neither explicitly allowed nor prohibited.

Factors States May Evaluate When Considering Legalizing Lane Splitting

Lawmakers consider the pros and cons of lane splitting and lane filtering laws.

When motorcyclists lane split, there are multiple benefits, including reduced traffic congestion, smoother traffic flow, and shorter commute times—as motorcyclists can navigate through congested areas more efficiently. It may also lower pollution levels by minimizing idling times and speeding up commutes. Additionally, a UC Berkeley study found that careful lane splitting can improve rider safety by lowering the risk of rear-end collisions in stop-and-go or stationary traffic.

Lane splitting raises several safety concerns, including the risk of a motorcycle accident caused by side-swiping or collisions with other vehicles. Other drivers who are unfamiliar with lane splitting may react unpredictably, increasing the danger of motorcycle accidents. Legalizing it could also complicate traffic enforcement, requiring additional training and clearer regulations. Additionally, some drivers may view lane splitting as unsafe or unfair, potentially leading to increased road tension.