Keep Right: Which States Enforce Left-Lane Passing Only?
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StateKeep Right?ExplanationCurrent Status:LawCommentsSource:
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Alaska< SL
If driving the speed limit, you can drive in any lane
If traveling slower than speed limit
13 AAC 002.50(b)
http://www.mit.edu/~jfc/right.html
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North Carolina
< SL
If driving the speed limit, you can drive in any lane
If traveling slower than speed limit
20-146(b),(e)Keep right if below speed limit. Some highways are posted "slower traffic keep right."
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Ohio< SL
If driving the speed limit, you can drive in any lane
If traveling slower than speed limit
4511.25
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Maryland< SL
If driving the speed limit, you can drive in any lane
If traveling slower than speed limit
21-301Keep right if driving 10 MPH under speed limit, or slower than speed of traffic if conditions require speed below limit
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MichiganMaybeSee CommentsTo let faster traffic pass257.634Keep right except to pass except in heavy traffic or on freeways with three or more lanes.
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South DakotaNoDo not require vehicles to keep rightTo let faster traffic pass32-26-1Only "slow moving vehicles" need to keep right.
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ArkansasOtherSee CommentsTo let faster traffic pass27-51-301(b)Law prohibits obstructing traffic by driving continuously in the left lane.
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IdahoSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
49-630(2)
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ConnecticutSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
14-230(b)Passing on right on Interstate prohibited when only two lanes: 14-233(4).
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DelawareSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
21-4114(b)
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New Hampshire
Slower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
RSA 265:16
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New YorkSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
V&TL 1120
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OregonSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
811.315
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Rhode IslandSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
31-15-2No passing on right on two-way street. 31-15-5.
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VermontSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
23-1031(b)
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WisconsinSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
346.05(3)
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AlabamaSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
32-5A-80(b)
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CaliforniaSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
CVC 21654(a)The duty of slower traffic to keep right applies "notwithstanding the prima facie speed limits."
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HawaiiSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
291C-41(b)Honolulu prohibits driving more than 5 MPH under the limit in the left lane. ROH 15-7.4.
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IowaSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
321.297(2)
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MinnesotaSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
169.18(10)
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MississippiSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
63-3-603(d)
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MissouriSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
305.015(3)305.151 prohibits "obstruct[ing] the regular flow of traffic on...any state highway.
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MontanaSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
61-8-321(2)
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South Carolina
Slower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
56-5-1810
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West VirginiaSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
17C-7-1(b)
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ArizonaSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
28-721(B)
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ColoradoSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
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 brochure discusses the law.
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NebraskaSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
60-6,131(2)
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NevadaSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
484B.627Slow-moving vehicles must move right if "imped[ing] ... movement of traffic."
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New MexicoSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
66-7-308(b)
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North DakotaSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
39-10-08(2)
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OklahomaSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
47-11-301, 47-11-309
One law requires vehicles below the speed limit to keep right. Another requires vehicles below the normal speed of traffic to keep right.
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TexasSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
545.051(b)
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.
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WyomingSlower
Keep right if going slower than the normal speed of traffic
If moving more slowly than traffic
31-5-201(b)
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)
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PennsylvaniaUsuallySee Comments
Always (unless passing or turning left)
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."
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WashingtonUsuallySee Comments
Always (unless passing or turning left)
46.61.100May also use left lane to allow traffic to merge or "when traveling at a speed greater than the traffic flow."
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Massachusetts
YesLeft lane only for passing or turning left
Always (unless passing or turning left)
MGL 89-4BPassing on right prohibited on undivided two-way road, MGL 89-2.
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New JerseyYesLeft lane only for passing or turning left
Always (unless passing or turning left)
39:4-88Keep right except to pass. Passing on right prohibited unless vehicles are in "substantially continuous lines." 39:4-85.
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KansasYesLeft lane only for passing or turning left
Always (unless passing or turning left)
8-1522(c), 8-1514(b)Keep right except to pass on rural roads since July 1, 2009.
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LouisianaYesLeft lane only for passing or turning left
Always (unless passing or turning left)
R.S. 32:71On multilane highways keep right except to pass and move right if blocking overtaking traffic.
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MaineYesLeft lane only for passing or turning left
Always (unless passing or turning left)
29A-2052(6)Keep right except to pass where speed limit is at least 65.
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KentuckyYesLeft lane only for passing or turning left
Always (unless passing or turning left)
189.340(7)Keep right except to pass where speed limit is at least 65.
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IllinoisYesLeft lane only for passing or turning left
Always (unless passing or turning left)
625 ILCS 5/11-701(b), (d)Keep right except to pass on limited access highways since January 1, 2004.
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FloridaYieldMove right if blocking traffic in the left laneTo let faster traffic pass316.081(2) and (3)Slower traffic keep right and all traffic yield left lane to traffic approaching from behind.
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GeorgiaYieldMove right if blocking traffic in the left laneTo let faster traffic pass40-6-40(b), 40-6-184Slower traffic keep right and (since 2014) all traffic yield left lane to traffic approaching from behind.
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IndianaYieldMove right if blocking traffic in the left laneTo let faster traffic pass9-21-8-2(b)As of July 1, 2015 the left lane of a multilane highway is for passing.
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TennesseeYieldMove right if blocking traffic in the left laneTo let faster traffic pass55-8-115(b)Yield to faster traffic in left lane effective July 1, 2016.
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VirginiaYieldMove right if blocking traffic in the left laneTo let faster traffic pass46.2-804(1), 46.2-842.1Yield left lane to faster traffic on signal. State police say this applies even when faster traffic is speeding.
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UtahYieldMove right if blocking traffic in the left laneTo let faster traffic pass41-6a-701, 41-6a-704Must move right to let faster traffic pass.
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