Wisconsin's keep-right rules are found primarily in Wisconsin Statutes §346.05, with additional slow-traffic requirements in §346.59.
Under §346.05, drivers generally must operate on the right half of the roadway, subject to exceptions for passing, left turns, obstructions, construction, one-way roadways and properly marked lane-use situations.
Wisconsin also requires slow-moving traffic to keep right in situations covered by the statute. On multi-lane highways, the practical rule is that drivers should keep the left lane clear when they are not actively passing.
Wisconsin State Patrol has specifically reminded drivers to keep the left lane clear for passing on multi-lane highways. Drivers who remain in the left lane unnecessarily can interfere with traffic flow and encourage unsafe passing on the right.
In addition, §346.59 prohibits driving a motor vehicle at a speed so slow that it impedes the normal and reasonable movement of traffic unless the reduced speed is necessary for safe operation or required by law.
A driver moving slowly enough to impede traffic must, when practicable, yield the roadway to overtaking vehicles and may be required to increase speed or yield when directed by a traffic officer.
Exceptions
- Overtaking and passing another vehicle when permitted by law.
- Preparing for a lawful left turn or U-turn.
- Avoiding pedestrians, animals, obstructions or roadway hazards.
- The right side of the roadway is closed because of construction or repair.
- Following signs or pavement markings that designate another lane.
- Traveling on a roadway lawfully designated for one-way traffic.
- Driving slowly when reduced speed is necessary for safe operation or required by law.
Penalties
Violating Wisconsin's minimum-speed rule under §346.59 may result in a traffic citation and civil forfeiture.
Wisconsin's statewide deposit schedule lists impeding traffic by slow speed under §346.59(1) with a base forfeiture range of $20 to $40. Court costs, assessments and other charges can increase the total amount due.
Drivers should verify the current total shown on the citation or with the court handling the case.
Official Source
Wisconsin Statutes §§346.05 and 346.59 - Keep Right and Minimum Speed Rules
Last verified: October 10, 2026