我看到的告示牌是: keep right except to pass by law
State "keep right" laws:
State | Keep Right? | Law | Comments |
---|---|---|---|
Alabama | Slower | ||
Alaska | < SL | ||
Arizona | Slower | ||
Arkansas | Other | 27-51-301(b) | Law prohibits obstructing traffic by driving continuously in the left lane. |
California | Slower | The duty of slower traffic to keep right applies "notwithstanding the prima facie speed limits." | |
Colorado | Slower | 42-4-1001(2), 42-4-1103(3), 42-4-1013 |
The left lane is reserved for passing where the speed limit is 65 or higher. A state police brochure discusses the law. |
Connecticut | Slower |
Passing on right on Interstate prohibited when only two lanes: 14-233(4). |
|
Delaware | Slower | ||
Florida | Yield | Slower traffic keep right and all traffic yield left lane to traffic approaching from behind. | |
Georgia | Yield | Slower traffic keep right and all traffic yield left lane to traffic approaching from behind. | |
Hawaii | Slower |
Honolulu prohibits driving more than 5 MPH under the limit in the left lane. ROH 15-7.4. |
|
Idaho | Slower | ||
Illinois | Yes | Keep right except to pass on limited access highways since January 1, 2004. | |
Indiana | Usually |
As of July 1, 2015 the left lane of a multilane highway is for passing. |
|
Iowa | Slower | ||
Kansas | Yes | 8-1522(c), 8-1514(b) | Keep right except to pass on rural roads since July 1, 2009. |
Kentucky | Yes | Keep right except to pass where speed limit is at least 65. | |
Louisiana | Yes | On multilane highways keep right except to pass and move right if blocking overtaking traffic. | |
Maine | Yes | Keep right except to pass where speed limit is at least 65. | |
Maryland | < SL | Keep right if driving 10 MPH under speed limit, or slower than speed of traffic if conditions require speed below limit | |
Massachusetts | Yes |
Passing on right prohibited on undivided two-way road, MGL 89-2. |
|
Michigan | Maybe | Keep right except to pass except in heavy traffic or on freeways with three or more lanes. | |
Minnesota | Slower | ||
Mississippi | Slower | 63-3-603(d) | |
Missouri | Slower |
305.151 prohibits "obstruct[ing] the regular flow of traffic on...any state highway. |
|
Montana | Slower | 61-8-321(2) | |
Nebraska | Slower | ||
Nevada | Slow | Slow-moving vehicles must move right if "imped[ing] ... movement of traffic." | |
New Hampshire | Slower | ||
New Jersey | Yes | 39:4-88 | Keep right except to pass. Passing on right prohibited unless vehicles are in "substantially continuous lines." 39:4-85. |
New Mexico | Slower | 66-7-308(b) | |
New York | Slower | ||
North Carolina | < SL | Keep right if below speed limit. Some highways are posted "slower traffic keep right." | |
North Dakota | Slower | 39-10-08(2) | |
Ohio | < SL | ||
Oklahoma | Slower | One law requires vehicles below the speed limit to keep right. Another requires vehicles below the normal speed of traffic to keep right. | |
Oregon | Slower | ||
Pennsylvania | Usually | 75-3313(d), 75-3301(b) | May also use left lane to allow traffic to merge or "when traveling at a speed greater than the traffic flow." |
Puerto Rico | < SL | Title 9 §5123 | |
Rhode Island | Slower |
No passing on right on two-way street. 31-15-5. |
|
South Carolina | Slower | ||
South Dakota | No | Only "slow moving vehicles" need to keep right. | |
Tennessee | Slower | 55-8-115(b) | |
Texas | Slower |
Most rural interstates are posted "left lane for passing only" pursuant to 544.011. Passing on right prohibited except on one-way roadways. 545.057. |
|
Utah | Yield | Must move right to let faster traffic pass. | |
Vermont | Slower | ||
Virginia | Yield |
Yield left lane to faster traffic on signal. State police say this applies even when faster traffic is speeding. |
|
Washington | Usually | May also use left lane to allow traffic to merge or "when traveling at a speed greater than the traffic flow." | |
West Virginia | Slower | ||
Wisconsin | Slower | 346.05(3) | |
Wyoming | Slower | Since July 1, 2005, it is illegal to obstruct traffic moving within the speed limit by driving in the left lane for a long time. [31-5-304(c)](http://legisweb.state.wy.us/statutes/statutes.aspx?file=titles/Title31/T31CH5AR3.htm) |