| State |
Initial effective date |
Where permitted |
| Arkansas |
07/30/09 |
roads with a posted speed limit of 55 mph or less excluding interstate highways and controlled access highways |
| California |
01/01/07 |
natural islands larger than 20,000 acres with a population greater than 4,000,000 |
| Florida |
06/16/09 |
roads with a posted speed limit of 35 mph or less |
| Idaho |
01/01/09 |
local option |
| Illinois |
08/31/07 |
roads with a posted speed limit of less than 35 mph if allowed by local ordinance |
| Kansas |
07/01/08 |
public roads except interstate, federal or state highways; within corporate city limits if allowed under local ordinance |
| Louisiana |
08/15/08 |
roads with a posted speed limit of 55 mph or less except interstate highways, controlled access highways, or multi-lane divided highways with partial or no control of access |
| Maine |
9/09 |
roads with a posted speed limit of 35 mph or less |
| Minnesota |
08/01/09 |
local option |
| Missouri |
08/14/08 |
local option |
| Nebraska |
01/01/11 |
any road except interstate highways, freeways or expressways |
| New Hampshire |
9/11/10 |
roads with a posted speed limit of 35 mph or less located within 25 miles of the registrant's home or place of business |
| North Dakota |
08/01/07 |
any paved road except highways with a posted speed of more than 65 mph |
| Oklahoma |
11/01/08 |
any road except interstate highways |
| Tennessee |
07/01/08 |
streets where the posted speed limit is less than 40 mph; a county or municipality may prohibit the operation of medium-speed vehicles on any road under its jurisdiction if the governing body of the county or municipality determines that such a prohibition is necessary in the interest of safety |
| Utah |
10/01/08 |
any road except an interstate freeway; limited access highway; street within a county of the first class; municipality that is within a county of the first class; or municipality with a population of 7,500 or more people |
| Wyoming |
01/01/08 |
any road except interstate highways |
