“Keep Right” State Laws Interactive Map

Scroll over the state to reveal the “Keep Right” Law. You can click on the state to be taken to the state law in another tab.

All states allow drivers to use the left lane (when there is more than one in the same direction) to pass. Most states restrict use of the left lane by slow-moving traffic that is not passing.

States which only allow passing in the left lane:

Arkansas
Illinois
Kentucky
Louisiana
Maine
Massachusetts
New Jersey

States which require slower traffic to move right only if they are blocking traffic:

Florida
Georgia
Nevada
Utah
Virginia

States which require drivers moving slower than the speed limit to move right:

Alaska
Maryland
North Carolina
Ohio
Puerto Rico

States with other rules

Michigan allows only passing on the left lane unless there is heavy traffic or more than three lanes on the freeway
Pennsylvania and Washington allow use of the left lane to pass, allow traffic to merge, or "when traveling at a speed greater than the traffic flow."

States which require slower traffic to move right:

Alabama
Arizona
California
Colorado
Connecticut
Delaware
Hawaii
Idaho
Indiana
Iowa
Minnesota
Mississippi
Missouri
Montana
Nebraska
New Hampshire
New Mexico
New York
North Dakota
Oklahoma
Oregon
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Vermont
West Virginia
Wisconsin
Wyoming

There are two ways for drivers to take positive action against slow blocking drivers.

We believe that once the Smart Phone Processing System is popular, it will lead the way to the Vehicle Processing System.

Smart Phone

Processing System
operating via smart phone technology
and an App.

The smart phone is held in a dashboard holder.

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Vehicle

Processing System

operating in the vehicle

Installed at the time of manufacturing by an OEM (Original Equipment Manufacturer) or by Retrofit in an auto repair shop, car dealership, etc.

“Slow Blocking Drivers really make me angry, but having MOSD in my car makes me smile!”

Kelly Cooper, White House Station, NJ

“MOSD has made my driving world so much better!”

Bryan Johnson, Washington, D.C.

“Having MOSD in my car gives me personal power!”

Sam Harris, Lecanto, FL

“Thank you MOSD. It is great to report slow bad drivers!”

Sylvia Real, Wheeling, WV

“MOSD is a great invention that will save many lives!”

Wanda Price, Tampa, FL

“Driving is more fun with my MOSD App. Now I can report those Slow Pokes!”

Kaela O’Brien, Sarasota, FL